GIA Certified Diamonds

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Why We Buy and Sell GIA Certified Diamonds, Wedding Bands, and Engagement Rings at Gray & Sons?

We are a local South Florida boutique offering a wide selection of GIA certified diamond jewelry, engagement rings, diamond bracelets, diamond necklaces, pendants, and loose diamonds to buy online or in our Miami Beach showroom. Conveniently located across the Bal Harbor shops our diamond jewelry comes with a GIA certificate and a one year warranty. We have in-house Gemologists at our boutique and are known as the top GIA Diamond dealer near Plantation, Boca Raton, Deerfield, West Palm Beach, and Pembroke Pines.

Top GIA Certified Diamond Dealer in South Florida

Any of the GIA certified diamonds you see here can be sold in the setting as it is shown or for a lower price if you want to just buy the loose diamond. We can also change the setting if you are in love with the diamond but would prefer a different setting. Call us for price quote and details.

Our curated collection of GIA diamond rings and diamond eternity bands offers a variety of cuts and sizes for any style. Gray & Sons may not have the largest selection of GIA Certified diamonds, but we sell the best diamonds at the best price! Why? We buy our diamond studs, diamond rings, engagement rings, and diamond jewelry from the public in Coral Gables, Brickell Avenue, Bal Harbor, as well as from all over the United States. There is no middle man involved. Our diamond specialists and jewelry experts handle the entire process with professionalism. The diamonds we buy are recut, polished, then sent to obtain a GIA certification. We then sell the diamond piece back on the market. If you want the best diamonds at the best price Gray & Sons Jewelers has it. By selling GIA diamonds as we have been for 30 years for the best price in the nation, we give a new life to every diamond. Get your diamond piece with us and feel great about your new accessory every time!

The #1 Place to Buy Engagement Rings and Diamond Eternity Bands

We send all our diamonds jewelry to GIA for certification because they are the gold standard world wide for diamonds. Since established in 1931, GIA has proved themselves as the world’s foremost grading and certification authority on diamonds, colored stones, and pearls. As a nonprofit institute, GIA is the leading source of knowledge, standards, and education in gems and jewelry. In 1953, the GIA developed its International Diamond Grading System and the Four Cs (cut, clarity, color, and carat weight) as a standard to compare and evaluate the quality of diamonds. The key to GIA– they don't buy, sell, trade or cut diamonds – they don't value (how much is my diamond worth?) so there is no conflict of interest, ulterior motives for higher or lower grading. Multiple diamond gemologists score each diamond and must agree. This avoids "pay offs", dishonest deals for exaggerated color or clarity grading. Their integrity over the years has earned them the ‘Gold Standard’ reputation worldwide. When you want to sell your GIA Diamond to a certified dealer look to Gray & Sons. Our Miami showroom in Miami beach across from Bal Harbour shops is the top buyer and seller of all GIA certified diamond studs and diamond engagement rings.

Why GIA Diamonds?

The Gemological Institute of America – The Gold Standard Worldwide for Diamonds. The GIA Laboratory provides a variety of gem grading and identification reports. Diamond grading reports for unmounted natural diamonds determine their key characteristics: color, clarity, cut and carat weight. With current deceptive practices all over the world today it is most important to buy a diamond with a GIA certificate to guarantee that you are not buying a man made diamond, or a diamond that has been treated with high heat and pressure to enhance the color ( HPHT ). GIA issues a complete Diamond Grading Report. Gray & Sons goes an extra step and pays GIA to engrave the certificate number on the diamond after grading – to offer our customers peace of mind to know – the “Pedigree” delivered with their diamond is really for THAT diamond. We’re the only jeweler in all of Miami Beach to offer this deal!

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  • Gia Certified Round Diamond .70 Carats (H color, SI2 clarity)

    Gia Certified Round Diamond .70 Cts H Color Si2 ClarityGIA Certificate
    ESTIMATED RETAIL: $3,465.00 NEW MSRP: $3,465.00 G&S Price: $1,850
    SAVINGS: $1,615 (47% off)
    Financing available with .
    Item #:S514712
  • GIA certified Cocktail platinum ring w/ center yellow diamond 1.06cts (Light Yellow Fancy, SI1) ring in platinum

    GIA certified 1.06 carat, full cut round brilliant light yellow color- SI1 clarity diamond set in a ballerina platinum mounting. Ballerina mounting has over 5 carats marquise, full cut round brilliant, and baguette diamond. Width at the shank is 0.08 inches (2mm), width at the top is 0.89 inches (22.8mm). Size 6.

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 7.2 pennyweights and is Platinum.GIA Certificate
    ESTIMATED RETAIL: $19,500.00 NEW MSRP: $19,500.00 G&S Price: $12,500
    SAVINGS: $7,000 (36% off)
    Financing available with .
    Item #:S514740
  • GIA Certified Round diamond 1.73cts (L color VVS1 Clarity) 1.04cts (Natural Faint Pinkish Brown VS-1 Clarity) ring set in 18k white gold.

    GIA certified diamond ring with round cut diamond 1.73 carat (L Color, VVS1 Clarity) and round cut 1.04 carat (natural faint pinkish brown, VS-1 clarity) with 3.25 carats in a cluster diamond setting in 18k white gold. Size 6.75

    This GIA certified ring is currently size 6.75 and some items can be sized up or down, please ask! It weighs 9.1 gramms and is 18k White Gold.GIA CertificateGIA Certificate
    ESTIMATED RETAIL: $36,500.00 NEW MSRP: $36,500.00 G&S Price: $20,850
    SAVINGS: $15,650 (43% off)
    Financing available with .
    Item #:S513765
  • GIA certified diamond ring 1.61cts (J color, VS1 clarity)

    GIA certified round brilliant cut diamond 1.61 carat (J color, VS1 clarity) set in 18k white gold mounting. Mounting has 12 full cut round brilliant diamond, approx 1 carat total weight- Estimate: G-H color, VS-SI clarity. Size 6.5 . Matching wedding band with 13 diamonds is available. .

    This GIA certified ring is currently size 6.5 and some items can be sized up or down, please ask! It weighs 4.6 pennyweights and is 18k White Gold.GIA Certificate
    ESTIMATED RETAIL: $19,900.00 NEW MSRP: $19,900.00 G&S Price: $12,900
    SAVINGS: $7,000 (35% off)
    Financing available with .
    Item #:S514630
  • GIA certified round cut diamond ring with 1.19 carats, (J Color, Vs1 clarity) solitaire ring in 18k white gold. Size 5.5

    GIA certified round brilliant cut diamond 1.19 carat (J color, VS1 clarity) twig/branch wedding style solitaire ring in 18k white gold with a single round brilliant cut diamond. Size 5.5.

    This GIA certified ring is currently size 5.5 and some items can be sized up or down, please ask! It weighs 4.3 pennyweights and is 18k.GIA Certificate
    ESTIMATED RETAIL: $10,700.00 NEW MSRP: $10,700.00 G&S Price: $5,950
    SAVINGS: $4,750 (44% off)
    Financing available with .
    Item #:S514629
  • Glamorous flower diamond earrings with approx. 13. 50 carats white, natural pink & brown/yellow diamonds set in 18K tri-color gold.

    Glamorous flower diamond earrings with approx. 12.50 carats white, natural pink & brown/yellow diamonds set in 18k tri-color gold. Natural full cut round brilliant Pink diamonds :approximately 10 carats. Natural full cut brown/yellow diamonds approximately: 1.75 carat, (some GIA certified). Natural full cut round brilliant white diamonds; approximately : 0.80 carat. Clip on post for additonal comfort and security. 2.25 inch hanging length.GIA CertificateGIA Certificate
    ESTIMATED RETAIL: $60,000.00 NEW MSRP: $60,000.00 G&S Price: $35,880
    SAVINGS: $24,120 (40% off)
    Financing available with .
    Item #:S513708
  • GIA Certified Marquise brilliant cut loose diamond 0.83 cts (H Color, SI2 Clarity)

    GIA Certified Marquise brilliant loose diamond 0.83 cts (H, SI2)GIA Certificate
    ESTIMATED RETAIL: $3,300.00 NEW MSRP: $3,300.00 G&S Price: $1,550
    SAVINGS: $1,750 (53% off)
    Financing available with .
    Item #:S512845
  • GIA certified square diamond 1.01 cts (E Color, SI1 Clarity) ring set in 14k white gold with diamond and amythest accents.

    GIA certified square diamond 1.01carat (E Color, SI1 Clarity) engagement ring in 14k white gold with diamond & amythest accents. Size 4.5.

    This GIA certified ring is currently size 4.5 and some items can be sized up or down, please ask! It weighs 2.8 gramms and is 14k White Gold.GIA Certificate
    ESTIMATED RETAIL: $11,750.00 NEW MSRP: $11,750.00 G&S Price: $6,400
    SAVINGS: $5,350 (46% off)
    Financing available with .
    Item #:S511644
  • GIA Certified Emerald cut diamond 1.08 cts (J Color, VS1 Clarity) solitaire ring set in 14k yellow gold. Size 9.5

    GIA certified square emerald cut diamond 1.08 carat (J Color, VS1 Clarity, Excellent polish) solitaire ring set in a 4 prong mounting 14k yellow gold. Size 9.5.

    This GIA certified ring is currently size 9.5 and some items can be sized up or down, please ask! It weighs 1.5 pennyweights and is 14k.GIA Certificate
    ESTIMATED RETAIL: $7,400.00 NEW MSRP: $7,400.00 G&S Price: $4,920
    SAVINGS: $2,480 (34% off)
    Financing available with .
    Item #:S509405
  • GIA certified cushion brilliant cut diamond 1.55 carat (H color, VS2 clarity) solitaire ring

    GIA certified cushion brilliant cut diamond 1.55 carat (H color, VS2 clarity) solitaire ring set in an 18k white gold simple solitare. Size 7

    This GIA certified ring is currently size 7 and some items can be sized up or down, please ask! It weighs 2.4 pennyweights and is 18k White Gold.GIA Certificate
    ESTIMATED RETAIL: $17,550.00 NEW MSRP: $17,550.00 G&S Price: $8,800
    SAVINGS: $8,750 (50% off)
    Financing available with .
    Item #:S513425
  • GIA certified round brilliant cut diamond 1.05 carat (W-X Color, VS-1 Clarity) ring

    GIA certified round brilliant cut diamond 1.05 carat (W-X Color, VS-1 Clarity) ring set in a 14k yellow gold mounting with matching band with diamond accents. Size 6.

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 3.5 pennyweights and is 14k.GIA Certificate
    ESTIMATED RETAIL: $7,250.00 NEW MSRP: $7,250.00 G&S Price: $4,470
    SAVINGS: $2,780 (38% off)
    Financing available with .
    Item #:S509952
  • GIA Certified diamond ring set in 18k white gold

    GIA Certified Marquise diamond 1.01 ct (D Color, SI1 Clarity) set in 18k white gold setting with approx. 1 ct in baguettes and princess cut diamonds; size 8.

    This GIA certified ring is currently size 8 and some items can be sized up or down, please ask! It weighs 4.5 pennyweights and is 18k White Gold.GIA Certificate
    ESTIMATED RETAIL: $13,550.00 NEW MSRP: $13,550.00 G&S Price: $7,410
    SAVINGS: $6,140 (45% off)
    Financing available with .
    Item #:S510337
  • GIA certified diamond 1.18 cts (F Color, VS1 Clarity) ring set in 18k white gold. Size 6

    GIA Certified Diamond Ring - 1.18 cts emerald cut diamond. (F Color, VS1 Clarity) in an 18k white gold setting with channel set baguette side diamonds.

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 5.7 pennyweights and is 18k.
    ESTIMATED RETAIL: $16,250.00 NEW MSRP: $16,250.00 G&S Price: $8,750
    SAVINGS: $7,500 (46% off)
    Financing available with .
    Item #:S512855
  • GIA certified heart-shaped diamond 1carat (F color, VS2 clarity) ring set in 14k yellow gold. Size 10.5

    GIA certified heart shape diamond 1 carat (F color, VS2 clarity) ring in 14k yellow gold setting. Size 10.5.

    This GIA certified ring is currently size 10.5 and some items can be sized up or down, please ask! It weighs 3.8 pennyweights and is 14k.GIA Certificate
    ESTIMATED RETAIL: $12,200.00 NEW MSRP: $12,200.00 G&S Price: $6,980
    SAVINGS: $5,220 (43% off)
    Financing available with .
    Item #:S507594
  • Center .97 carat GIA certified diamond (H color SI2 clarity), set in colorful 18k setting with diamond, ruby & emerald accents

    GIA certified pear shape diamond 0.97 carat (H color, SI2 clarity) set in colorful 18k wide setting with diamond, ruby & emerald accents. Size 5.5. Ring width: 15.5mm.

    This GIA certified ring weighs 14.1 pennyweights and is 18k.GIA Certificate
    ESTIMATED RETAIL: $8,550.00 NEW MSRP: $8,550.00 G&S Price: $5,100
    SAVINGS: $3,450 (40% off)
    Financing available with .
    Item #:S512628
  • GIA certified square modified brilliant cut diamond 1.14 carat (H Color, SI2 Clarity)

    GIA certified square modified brilliant cut diamond 1.14 carat (H Color, SI2 Clarity) ring set in an 18K white gold "Halo" diamond setting (approx. total diamonds weight in setting: 0.75 carat) Size 7.

    This GIA certified ring is currently size 0 and some items can be sized up or down, please ask! It weighs 1.14 pennyweights and is 18k.GIA Certificate
    ESTIMATED RETAIL: $7,400.00 NEW MSRP: $7,400.00 G&S Price: $5,675
    SAVINGS: $1,725 (23% off)
    Financing available with .
    Item #:S510030
  • GIA certified marquise cut diamond 0.93 cts (G Color, SI1 Clarity) set in 18k yellow gold. Size 8.5

    GIA certified marquise diamond 0.93 carat (G color, SI1 clarity) ring set in a 18k yellow gold setting with app 2.50 carat baguette diamond; size 8.5

    This GIA certified ring is currently size 8.5 and some items can be sized up or down, please ask! It weighs 9.2 pennyweights and is 18k.GIA Certificate
    ESTIMATED RETAIL: $10,600.00 NEW MSRP: $10,600.00 G&S Price: $6,950
    SAVINGS: $3,650 (34% off)
    Financing available with .
    Item #:S511368
  • GIA certified princess cut diamond 1.01 cts (H Color, VS2 Clarity) ring set in platinum.

    GIA certified princess cut diamond 1.01 carat (H Color, VS2 Clarity) set in platinum with side diamonds and sapphire accents. Size 5.

    This GIA certified ring is currently size 5 and some items can be sized up or down, please ask! It weighs 5.8 pennyweights and is Platinum.GIA Certificate
    ESTIMATED RETAIL: $10,680.00 NEW MSRP: $10,680.00 G&S Price: $8,450
    SAVINGS: $2,230 (21% off)
    Financing available with .
    Item #:S506856
  • GIA certified rectangular diamond ring 1.53 cts (I Color, VS2 Clarity) set in micro pave diamond 18k white gold.

    GIA certified rectangular diamond 1.53 carats (I color, VS2 clarity) set in an 18k white gold swirl ring with approximately 1.5 carats in pave diamonds. Size 5.75.

    This GIA certified ring is currently size 5.75 and some items can be sized up or down, please ask! It weighs 4.7 pennyweights and is 18k White Gold.GIA Certificate
    ESTIMATED RETAIL: $15,900.00 NEW MSRP: $15,900.00 G&S Price: $8,970
    SAVINGS: $6,930 (44% off)
    Financing available with .
    Item #:S510111
  • GIA certified rectangular modifed diamond ring set in platinum

    GIA certified 1.14 carat rectangular modifed diamond, U-V color, VS2 clarity set in platinum mounting with rose cut diamond accents, Size 4.75

    This GIA certified ring is currently size 4.75 and some items can be sized up or down, please ask! It weighs 2.4 pennyweights and is Platinum.GIA Certificate
    ESTIMATED RETAIL: $9,200.00 NEW MSRP: $9,200.00 G&S Price: $5,200
    SAVINGS: $4,000 (43% off)
    Financing available with .
    Item #:S509713
  • Pair of Diamond studs: 2.01 carats (I color, SI1 clarity) and 2.01 carats (H color, SI2 clarity).

    Pair of GIA Certified diamond stud earrings : 2.01 carats (I color, SI1 clarity) and 2.01 carats (H color, SI2 clarity). 14k white gold 4 prong basket settings with screw backs.GIA CertificateGIA Certificate
    Item #:S519398
  • Emerald cut 31 diamond bracelet with 31 diamonds in platinum

    GIA certified emerald cut 31 diamonds bracelet with over 31 carats in (K-M color, SI-VVS clarity) diamonds in platinum. Length 6.75 inchesGIA Certificate
    Item #:S519174
  • GIA certified round brilliant diamonds studs 2.74 cts (Q to R range in color, VS1 clarity) & 2.80 cts ( S to T range color, VS2 clarity) set in 18k white gold.

    GIA certified round brilliant diamonds studs 2.74 cts (Q to R range in color, VS1 clarity) & 2.80 cts ( S to T range color, VS2 clarity) set in 18k white gold.GIA Certificate
    Item #:S517126
  • GIA certified diamond drop chandelier earrings in 14k white, yellow & pink gold;

    Stunning GIA certified diamond drop chandelier earrings with 2.33 carats in diamonds set in 14k white, yellow & pink gold; 2 GIA certified yellowish-brown pear shape diamonds with total approximate weight of 0.99 carats, 64 round & pricess cut diamonds totaling approximately 0.32 cts in Light yellow - Fancy Light yellow, VS-SI clarity diamonds, 50 prong set round brilliant cut diamonds for an approximate total weight of 0.30 carats in white to light pink color, I1-I2 clarity diamonds and 126 prong set round brilliant cut diamonds totaling approximately 0.72 cats in H-I color, VS2-SI2 clairty. Total hanging length: 2.25" Complete with AIG appraisal and GIA Certificate.GIA CertificateGIA Certificate
    Item #:S519188
  • Burma ruby bracelet with diamond halo in 14k yellow gold settings

    Stunning GIA certified 19.55 carat oval cut Burma (Myanmar) purplish red ruby bracelet with 1.86 carats in diamond halo settings all in 14k yellow gold 6.75" length.GIA Certificate
    Item #:S519184
  • GIA certified emerald ring with diamond accents in 18k white gold

    GIA certified 4.60 carat octogonal cut emerald ring with two trapezoid side diamonds with a total approximate weight of 1.63 carats set in 18k white gold. Size 6.75.

    This Emerald ring is currently size 6.75 and some items can be sized up or down, please ask! It weighs 5 gramms and is 18k White Gold.GIA Certificate
    Item #:S519185
  • GIA Certified Diamond Ring- 1.07cts (M Color, VVS2 Clarity) 0.83 cts (L Color, VVS-2 Clarity)

    GIA Certified Diamond Ring- 1.07cts (M Color, VVS2 Clarity) 0.83 cts (L Color, VVS-2 Clarity) Round Diamond set in a platinum setting w/app. 1 carat in baguettes.

    This GIA certified ring is currently size 6.25 and some items can be sized up or down, please ask! is Platinum.
    Item #:S510723
  • GIA Ruby and diamond necklace in 18k

    GIA ruby and diamond necklace in 18k with 11.91 carats in G-H color, VS-SI clarity diamonds and 55.07 in GIA Burma rubies. Length 17 inches.GIA Certificate
    Item #:S519179
  • GIA certified oval sapphire 10.55 carat ring with 4.25 carats in diamonds in 18k

    GIA certified oval brilliant cut sapphire 10.55 carat ring with 4.25 carats in G-H color, VS-SI clarity diamonds in 18k. Sapphire is not treated and Sri Lanka origin. Size 6

    This Diamond/Sapphires ring is currently size 6 and some items can be sized up or down, please ask! It weighs 13.4 pennyweights and is 18k.GIA CertificateGIA Certificate
    Item #:S519180
  • GIA certified 14.41 tanzanite necklace with 7.90 carats in diamonds

    GIA certified pear brilliant cut 14.41 carat tanzanite necklace with 7.90 carats in G-H color, VS-SI clarity round and baguette diamonds in 14k white gold. Length 17 inches.GIA CertificateGIA Certificate
    Item #:S519182
  • GIA certfied Tanzanite ring in platinum with diamond halo & accents on shank

    Rich & Regal! pear cut GIA certfied 7.84 carat Tanzanite ring set in platinum with 0.48 carats in diamond bezel supported by diamond ribbon shoulders. Size 6.5

    This tanzanite/diamond ring is currently size 6.5 and some items can be sized up or down, please ask! It weighs 8.8 gramms and is Platinum.GIA CertificateGIA Certificate
    Item #:S519189
  • GIA Certified Natural Fancy Yellow diamond ring 5.47 carat radiant cut Fancy Yellow VVS2

    GIA Certified Natural Fancy Yellow diamond ring in platinum and 18k yellow gold. 5.47 carat radiant cut Fancy Yellow VVS2 center diamond. Approximately 1.5 carats in side white emerald cut G-H color, VS clarity diamonds. Size 7.25

    This GIA certified ring is currently size 7.25 and some items can be sized up or down, please ask! It weighs 7 pennyweights and is Platinum.GIA Certificate
    Item #:S519090
  • GIA certified diamond studs 1.20 carat (J, SI2) and 1.22 carat (J, SI2)

    GIA certified round brilliant cut diamond studs 1.20 carat (J color, SI2 clarity ) and 1.22 carat (J color, SI2 clarity) set in 14k white gold setting.GIA CertificateGIA Certificate
    Item #:S519025
  • GIA certified pear shape 3.18 carat diamond (J color, SI2 clarity) soliaire ring set in platinum

    GIA certified pear shape 3.18 carat diamond (J color, SI2 clarity) solitaire ring set in platinum. Size 4.5

    This GIA certified ring is currently size 4.5 and some items can be sized up or down, please ask! It weighs 3.6 pennyweights and is Platinum.GIA Certificate
    Item #:S518912
  • GIA Certified round brilliant cut 1.98 carat (D color, I2 clarity) solitaire ring in platinum

    GIA Certified round brilliant cut 1.98 carat (D color, I2 clarity) solitaire ring in platinum. Size 6.75 Diamond comes with GIA certificate (D, VS2) but diamond exploded and became I2 clarity.

    This GIA certified ring is currently size 6.75 and some items can be sized up or down, please ask! It weighs 0 gramms and is Platinum.GIA Certificate
    Item #:S518803
  • GIA certified round brilliant cut diamond 2.03 carat (G color,VS2 clarity)

    GIA certified round brilliant cut diamond 2.03 carat (G color, VS2 clarity)

    This GIA certified ring is currently size 0 and some items can be sized up or down, please ask! It weighs 0 gramms and is DIAMOND.
    Item #:S518733

GIA Certified Diamonds