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 Cartier diamond ring 0.45 carat, E color, VVS2 clarity, in platinum. Size 6.5

Cartier Ring
GIA certified Cartier diamond solitaire 0.45 carat ring in platinum. Size 6.5

$4,250
GIA Certified emerald cut diamond 5.04 carat (E color, VS2 clairity) ring

Ring
GIA Certified emerald cut diamond 5.04 carat (E color, VS2 clairity) ring

$159,000
GIA certified 11.40 carat marquise shape color changing sapphire

Ring
GIA certified 11.40 carat marquise shape color changing sapphire

$16,000
Diamond eternity band in 18k white gold with over 9.00 carats diamonds- 6 are GIA certified.

Ring
Diamond eternity band in 18k white gold with over 9.00 carats diamonds- 6 are GIA certified.

$23,700
GIA certified round brilliant cut 1.14 carat D color, VS2 clarity diamond ring

Ring
GIA certified round brilliant cut 1.14 carat D color, VS2 clarity diamond ring

$11,500
GIA certified emerald cut 4.85 carat diamond (I color, VS1 clarity) ring

Ring
GIA certified emerald cut 4.85 carat diamond (I color, VS1 clarity) ring

$88,000
GIA certified diamond studs; RBC 2.02 carat (K color, IF clarity, Triple EX; Polish, Symmetry & Cut

Earrings
GIA certified diamond studs; RBC 2.02 carat (K color, IF clarity, Triple EX; Polish, Symmetry & Cut

$43,500
GIA certified cut-cornerned rectangular modified brilliant 1.22 carat (D color, SI2 clarity)

Ring
GIA certified cut-cornerned rectangular modified brilliant 1.22 carat (D color, SI2 clarity)

$3,500
GIA Certified round brilliant cut 3.09 carat diamond, H Color, VS2 clarity set on a "FINGER MATE" platinum & 14K white gold setting with 4 tapered baguettes

Ring
GIA Certified round brilliant cut 3.09 carat diamond, H Color, VS2 clarity set on a "FINGER MATE" platinum & 14K white gold setting with 4 tapered baguettes

$62,900
GIA certified diamond studs 1.01 carat & 1.05 carat (H color, SI2 clarity)

Earrings
GIA certified diamond studs 1.01 carat & 1.05 carat (H color, SI2 clarity)

$8,500
GIA rectangular modified brilliant 1.08 carat diamond (E color, VVS1 clarity set in platinum

Ring
GIA rectangular modified brilliant 1.08 carat diamond (E color, VVS1 clarity)

$8,900
Cartier Diamond Studs Earrings 8.06 CT GIA cert VVS2 E

Cartier Earrings
Cartier Diamond Studs Earrings 8.06 CT GIA cert VVS2 E

$490,000
GIA certified round brilliant cut diamond 1.05 carat (H color, SI2 clarity) ring

Ring
GIA certified round brilliant cut diamond 1.05 carat (H color, SI2 clarity) ring

$4,485
GIA certified Old European Brilliant cut diamonds earrings set in platinum with 14K white gold closing clasp. GIA certified old European brilliant center diamond 1.48 carat, J color, VS2 clarity and old European brilliant center diamond 1.48 carat J

Earrings
GIA certified Old European Brilliant cut diamonds earrings in Platinum

$18,900
GIA certified round brilliant cut 1.11 carat diamond set in 18K gold basket weaved textured ring mounting,

Ring
Mens Basket Weave Textured Ring with Diamond over 1 carat

$5,900
GIA certified marquise cut diamond 4 carat (G color, VVS1 clarity, Excellent polish)

Ring
GIA certified marquise cut diamond 4 carat (G color, VVS1 clarity, Excellent polish)

$89,500
GIA certified princess cut diamond 2.09 carat (J color, SI1 clarity) solitaire ring

Ring
GIA certified princess cut diamond 2.09 carat (J color, SI1

$10,950
GIA certified round brilliand cut diamond studs 1.04 carat and 1.03 carat both G color, VVS2 clarity set in 18k white gold setting

Earrings
GIA certified round brilliand cut diamond studs

$15,900
Emerald cut eternity band with approximately 6 carats set in platinum

Ring
Emerald cut eternity band with approximately 6 carats set in platinum

$12,900
GIA certified pear brilliant cut 1.52 carat diamond (D color, SI1 clarity, Excellent polish) ring

Ring
GIA certified pear brilliant cut 1.52 carat diamond (D color

$11,950
GIA certified pear brilliant shape 1.72 carat diamond (J color, SI1 clarity) ring

Ring
GIA certified pear brilliant shape 1.72 carat diamond ring

$8,500
GIA Certified Pear Shaped Gia Diamond Earrings (One Center Stone 1.20 Cts And The Other 1.27 Cts) I/J color, SI1 clarity In Platinum And 14k White Gold

Earrings
GIA Certified Pear Shaped Gia Diamond Earrings

$8,500
GIA certified round brilliant cut 2.19 carat diamond (H color, SI1 clarity) ring

Ring
GIA certified round brilliant cut 2.19 carat diamond (H color, SI1 clarity) ring

$19,250
GIA certified, cut-cornered rectangular modified brilliant diamonds Eternity band in platinum. Approx. Weight: 15 carats.

Ring
GIA certified Diamonds eternity band platinum.Total approx. weight: 15 carats

$54,000
GIA certified round brilliant cut 2 carat diamond (I color, VS2 clarity) ring

Ring
GIA Certified Round Brilliant Cut Diamond Ring

$17,500
GIA certified round brilliant cut 1.01 carat diamond (E color, VVS2 clarity) ring

Ring
Gia Certified Rount Brilliant Cut Diamond Ring

$14,500
GIA certified round brilliant cut diamond 1.14 carat (H color, I1 clarity, Excellent cut, Excellent polish, Excellent symmetry)

Ring
GIA certified round brilliant cut diamond 1.14 carat

$4,600
GIA certified round brilliant cut 3.33 carats total diamond studs

Earrings
GIA certified round brilliant cut 3.33 carats total diamond studs

$18,690
GIA certified round brilliant cut 1.78 carat diamond (I color, VS1 clarity) ring

Ring
GIA certified round brilliant cut 1.78 carat diamond (I color, VS1 clarity) ring

$16,500
Cartier "Destinee" collection, GIA certified 0.73 carat full ct round brilliant diamond set in a halo platinum setting.

Cartier Ring
Cartier "Destinee" collection, GIA certified 0.73 carat full ct round brilliant diamond set in a halo platinum setting.

$11,550
GIA certified 4.11 carat natural beryl cushion cut emerald ring

Ring
GIA certified 4.11 carat natural beryl cushion cut emerald ring

$18,260
GIA Certified Round Brilliant Cut Diamond 1.00 Carat (E Color, Very Good Symmetry) Ring Set In Platinum

Ring
GIA Certified Round Brilliant Cut Diamond 1.00 Carat (E Color, Very Good Symmetry) Ring Set In Platinum

$4,950
GIA Certified ruby & diamonds ring set in platinum. Brilliant oval cut ruby: 5.03 carats

Ring
GIA Certified ruby & diamonds ring set in platinum. Brilliant oval cut ruby: 5.03 carats

$32,950
Gia Certified Marquise Diamond 1.01 Ct (D Color, Si1 Clarity)

Ring
Gia Certified Marquise Diamond 1.01 Ct (D Color, Si1 Clarity)

$7,410
GIA certified round brilliant cut diamond 1.02 carat (G color,  Internally Flawless clarity) ring set in Tacori platinum setting

Ring
GIA certified round brilliant cut diamond 1.02 carat (G color, Internally Flawless clarity) ring set in Tacori platinum setting

$13,000
GIA certified pear shaped 3.84 carats on a necklace set with approximately 5 carats in princess cut diamonds by-the-inch

Necklace
GIA certified pear shaped 3.84 carats on a necklace set with approximately 5 carats in princess cut diamonds by-the-inch

$38,800
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