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GIA Certified Diamonds

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Established in 1931, GIA is the world’s foremost grading and certification authority on diamonds, colored stones, and pearls. A public benefit, 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.

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. GIA issues a complete Diamond Grading Report. The reports contain a number of measurements, unique to the individual diamond being evaluated, including length (millimeters), width (millimeters), and depth (millimeters), as well as a diagram of where and what types of inclusions (flaws) are located in or on the diamond. Diamond grading reports are now demanded by most consumers purchasing diamonds over a certain size, typically for over 0.5 carat (100 milligrams), and almost always for over 1.0 carat (200 milligrams), and are considered an important tool in guaranteeing that a diamond is accurately represented to a potential buyer. 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.

At Gray & Sons, we offer a wide selection of GIA-certified diamond rings, bracelets, necklaces, pendants, and loose diamonds. Large diamond jewelry from our inventory comes with a GIA certificate. We have two in-house GIA-Certified Diamond Gemologists and Colored Stones Specialists.

Learn More: At Gray & Sons Jewelers, Our Commitment To Diamonds Runs Deep

Sell or Consign Your Diamonds
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    Princess cut diamonds by-the-inch necklace

    Princess cut diamonds approx. 5.0 carats by the inch accenting a GIA certified center pear shape diamond 3.84cts J color SI2 clarity. Length 16 inches.GIA Certificate
    G&S Price: $27,700.00
    Item #:S515791
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    Made for princess Diamonds by-the-inch

    Made for princess Diamonds by-the-inch with bezel set round sparkling diamond accents over 5.5 cts set in 14k white gold. Round center diamond GIA certified round brilliant diamond 3.01cts G color SI1 clarity. Length 16 inches.GIA Certificate
    G&S Price: $47,500.00
    Item #:S515797
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    GIA certified round brilliant diamond 1.21 ct J color, VS2 ct set in platinum

    GIA certified round brilliant diamond 1.21 ct J color, VS2 ct set in platinum setting with 2 baguettes .20 ct each and 2 triangular diamond .10 ct each H color VS2. Size 5.

    This GIA certified ring is currently size 5 and some items can be sized up or down, please ask! It weighs 5.7 pennyweights and is Platinum.GIA Certificate
    G&S Price: $8,400.00
    Item #:S515712
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    GIA certified Circular brilliant diamond 2.44 cts I color VS1 clarity

    GIA certified European cut circular brilliant cut 2.44 carat diamond (I color, VS1 clarity) in 18k white gold setting with approx. 1 carat in pave set accent side diamonds. Size 7

    This GIA certified ring is currently size 7 and some items can be sized up or down, please ask! It weighs 4.2 pennyweights and is 18k White Gold.GIA Certificate
    G&S Price: $17,100.00
    Item #:S515686
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    GIA Certified round diamond pendant. 0.80 carat K color, SI1 clarity

    GIA Cerified round brilliant diamond 0.80 ct. K color, SI1 clarity pendant on 14k white gold wheat chain with lobster clasp. Length 18 inches.GIA Certificate
    G&S Price: $1,500.00
    Item #:S515628
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    Collar of diamonds line choker with pave diamond hearts

    Beautiful Collar of diamonds line choker with hearts approximately 2.58cts in diamonds. Total of 172 diamond, and 16" long.
    G&S Price: $4,740.00
    Item #:S515792
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    GIA certified diamond studs 0.48 carat (K color, SI2 clarity) and 0.51 carat (I color, I2 clarity)

    GIA certified diamond studs 0.48 carat (K color, SI2 clarity) and 0.51 carat (I color, I2 clarity) set in 14k white gold.GIA CertificateGIA Certificate
    G&S Price: $1,500.00
    Item #:S515629
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    GIA certified Rectangular Modified Brilliant cut diamond 2.06 (L color, VS1 clarity)

    GIA certified Rectangular Modified Brilliant cut diamond 2.06 carat (L color, VS1 clarity) ring in 18k yellow gold. Size 9

    This GIA certified ring is currently size 9 and some items can be sized up or down, please ask! It weighs 0 gramms and is 18k.GIA Certificate
    G&S Price: $7,200.00
    Item #:S515681
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    Solitaire diamond engagement ring

    GIA certified round brilliant solitare diamond ring 1.51 carat (I color, VS2 clarity) set in 18k white gold classic setting. Size 6.

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 2.6 pennyweights and is 18k.GIA Certificate
    G&S Price: $8,850.00
    Item #:S515413
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    18k white gold two tone natural fancy yellow diamond ring

    Gorgeous 18k white gold two tone natural fancy yellow diamond ring radiant cut 0.81cts with VS2 clarity. Approximately 0.27cts in white diamonds. Size 6.25. Width: 9.8mm.

    This GIA certified ring is currently size 6.75 and some items can be sized up or down, please ask! It weighs 2.7 pennyweights and is 18k White Gold.
    G&S Price: $7,040.00
    Item #:S515684
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    GIA certified round brilliant diamond studs 1.19 cts I color, VS1 clarity and 1.19 cts I color, VVS2 clarity

    GIA certified round brilliant diamond studs 1.19 cts I color, VS1 clarity and 1.19 cts I color, VVS2 clarity total 2.38 cts set in 4 prong white gold basket setting.GIA CertificateGIA Certificate
    G&S Price: $11,250.00
    Item #:S515536
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    GIA certified 3.02 carat round brilliant diamond I color, SI2 clarity

    GIA certified 3.02 carat round brilliant diamond I color, SI 2 clarity Excellent polish, Excellent symmetry set in elegant platinum setting with baguette diamond on each side. Size 6.5

    This GIA certified ring is currently size 6.5 and some items can be sized up or down, please ask! It weighs 3.6 pennyweights and is Platinum.GIA Certificate
    G&S Price: $23,950.00
    Item #:S515494
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    Gia Certified Round Brilliant Diamond Ring With 2.15 Carat

    GIA Certified Lovely thick Round Brillian Cut Diamond 2.15 Carat, J color, SI2 clarity ring surrounded approx 3 carats in princess cut diamonds ( H-I color, SI1 clarity ) in 18k white gold. Size 7

    This GIA certified ring is currently size 7 and some items can be sized up or down, please ask! It weighs 8.6 pennyweights and is 18k White Gold.GIA Certificate
    G&S Price: $14,535.00
    Item #:S515548
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    GIA certified round brilliant diamond 1.61 carats H color I2 clarity

    GIA certified round brilliant cut diamond 1.61 carats H color I2 clarity set in classic six prong setting in 14k yellow gold. Size 6.

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 2.1 pennyweights and is 14k.GIA Certificate
    G&S Price: $2,750.00
    Item #:S515493
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    GIA certified diamond studs 1.55 cts M color, SI 1 clarity and 1.51 cts M color, VVS -2 clarity

    GIA certified diamond stud earrings in 18k white gold. Diamonds are 1.55 cts M color, SI1 clarity and 1.51 cts M color, VVS2 clarity.GIA CertificateGIA Certificate
    G&S Price: $9,900.00
    Item #:S515543
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    Round diamond 1.53 carat F color, I1 clarity

    GIA certified round diamond 1.53 carat F color, I1 clarity.GIA Certificate
    G&S Price: $5,360.00
    Item #:S515453
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    Gia Certified Diamond Studs

    GIA certified diamond studs round brilliant cut 0.73 carat I color, I2 clarity and round brilliant cut 0.78 carat G color, I1 clarity total 1.51 carat set in 14k white gold.GIA CertificateGIA Certificate
    G&S Price: $2,250.00
    Item #:S515455
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    GIA Certified Round cut diamond 0.56 ct, H Color, I1 Clarity

    GIA Certified Round cut diamond 0.56 ct, H Color, I1 ClarityGIA Certificate
    G&S Price: $700.00
    Item #:S515427
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    GIA certified cut-cornered rectangular modified brilliant cut diamond ring

    GIA certified engagement ring cut-cornered rectangular modified brilliant cut diamond 1.01 carat G color, VS1 clarity set in 14k white gold setting with approx. 0.70 cts in 6 side baguettes. Size 5.25GIA Certificate
    G&S Price: $6,950.00
    Item #:S515452
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    GIA Certified Rectangular Modified diamond 0.50 ct, H Color, SI1 Clarity

    GIA Certified Rectangular Modified diamond 0.50 ct, H Color, SI1 ClarityGIA Certificate
    G&S Price: $950.00
    Item #:S515426
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    GIA certified engagement rings 2.03 ct emerald cut

    GIA certified engagement rings 2.03 ct emerald cut E color, VS2 clarity set in platinum setting with 2 side emerald diamonds each approx. 0.25 ct each E color, VS1 clarity. Size 8. Ring shank width 0.7 inches (2mm), head diameter 0.32 inches (8.3mm).

    This GIA certified ring is currently size 8 and some items can be sized up or down, please ask! It weighs 6.2 pennyweights and is Platinum.GIA Certificate
    G&S Price: $22,900.00
    Item #:S515286
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    GIA cerfified Emerald cut diamond ring in platinum

    GIA certified Emerald cut diamond ring 3.21 carat L color, VVS2 clarity set in platinum setting with baguette diamonds on each side. Size 8.

    This GIA certified ring is currently size 8 and some items can be sized up or down, please ask! It weighs 4.4 pennyweights and is Platinum.GIA Certificate
    G&S Price: $13,500.00
    Item #:S515352
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    Cartier engagement ring in platinum

    Cartier engagement ring 1.01 ct Round Brilliant Diamond F color, Internally Flawless with GIA certificate, Excellent Cut, Excellent polish, Excellent symmetry set in platinum setting with 9 diamonds on each side approx. 0.60 ct. Size 6. Ring shank width 0.08 inches (2.2mm), head diameter 0.13 inches (3.3mm). With Cartier box, original receipt and GIA certificate.

    This Cartier ring is currently size 6 and some items can be sized up or down, please ask! It weighs 2.4 pennyweights and is Platinum.
    G&S Price: $19,500.00
    Item #:S515405
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    GIA certified 0.96cts diamond ring in 14k gold setting

    GIA certified diamond ring 0.96 carats (L, I2 ) in 14k gold setting. Size 7.

    This GIA certified ring is currently size 7 and some items can be sized up or down, please ask! It weighs 1.7 pennyweights and is 14k.
    G&S Price: $1,600.00
    Item #:S515337
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    GIA Certified Round Diamond Studs1.20 ct M, Faint Brown Color, VVS2 Clarity, 1.14 ct M Color, SI2 Cl

    GIA Certified Round Diamond Studs 1.20 ct M, Faint Brown Color VVS2 Clarity, 1.14 ct M, SI1 Clarity for a total of 2.34 ctsGIA Certificate
    G&S Price: $6,470.00
    Item #:S514857
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    GIA Certified Round Diamond Studs 1.10 ct J Color VVS1 Clarity, 1.15 K Color, VS2 Cl

    GIA Certified Round Diamond Studs 1.10 ct J Color, VVS1 Clarity, 1.15 ct K Color VS2 Clarity for a total of 2.25 cts.GIA Certificate
    G&S Price: $11,795.00
    Item #:S514858
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    Ball of fire pave diamond Dome ring in 18k white gold

    Ball of fire pave diamond Dome ring in 18k white gold with diamond accents around center GIA Certified Emerald Cut Diamond 1.10 cts (E Color VS-1 Clarity) .43cts (G Color VVS-2) .40cts (K Color VVS-2) stylish ring with 100 diamonds x 0.02 cts for a total of app. 2 cts H color SI1 clarity.Size 6.25 Width at the shank is 0.16 inches (4mm), width at the top is 0.54 inches (13.9mm).

    This GIA certified ring is currently size 6.25 and some items can be sized up or down, please ask! It weighs 7.6 pennyweights and is 18k White Gold.GIA Certificate
    G&S Price: $13,780.00
    Item #:S514242
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    GIA certified Marquise diamond ring - 2.23 cts J color, VS2 clarity.

    GIA certified Marquise diamond ring - 2.23 cts J color, VS2 clarity in 14k white gold setting. Size 6.5.

    This GIA certified ring is currently size 6.5 and some items can be sized up or down, please ask! It weighs 2.1 pennyweights and is 14k White Gold.
    G&S Price: $10,150.00
    Item #:S515348
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    GIA certified diamond ring 2.01 carat H color, VS2 clarity

    GIA certified diamond ring 2.01 cts H color, VS2 clarity Tacori engagement ring in 18k white gold with diamond accents. Size 6.5

    This GIA certified ring is currently size 6.5 and some items can be sized up or down, please ask! It weighs 2.4 pennyweights and is 18k White Gold.GIA Certificate
    G&S Price: $21,000.00
    Item #:S515236
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    GIA certified diamond ring 1.59 ct D color, VVS2 clarity

    GIA certified diamond ring 1.59 ct D color, VVS2 clarity Excellent cut set in platinum. Size 6

    This GIA certified ring is currently size 6 and some items can be sized up or down, please ask! It weighs 2.6 pennyweights and is Platinum.GIA Certificate
    G&S Price: $23,800.00
    Item #:S515199
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    GIA certified diamond 0.95 E color, SI1 clarity

    GIA certified diamond 0.95 E color, SI1 clarity set in 14k white gold ring with 0.80 cts diamond accents. Size 4

    This GIA certified ring is currently size 0 and some items can be sized up or down, please ask! It weighs 3.7 pennyweights and is 14k White Gold.GIA Certificate
    G&S Price: $4,950.00
    Item #:S515198
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    Diamond studs 1.27 cts (I, VS2), 1.30cts (I, VS1)

    GIA certified round brilliant cut diamond studs 2.57 total weight in a 4 prong basket setting.GIA CertificateGIA Certificate
    G&S Price: $9,790.00
    Item #:S515304
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    Diamond pin with pear, baguett and round shape diamonds

    Frosted Platinum Diamond pin with over 20 cts in round, pear and baguette diamonds with an average of H Color VS Clarity. 2 Pear shape diamonds are GIA Certified 0.86 ct G Color VS-1 Clarity and 0.79 ct G Color SI-1 Clarity. All other stone are in the range is G-I Color, VS-SI Clarity. Length 2.51 inches (63.9mm), width 1.56 inches (39.6mm).GIA CertificateGIA CertificateGIA CertificateGIA Certificate
    G&S Price: $35,900.00
    Item #:S514636
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    GIA certified cushion brilliant diamonds 1.66 cts I color SI2 clarity, 2.03 cts K color SI1 clarity set in a fan sapphire and diamond earrings in platinum.

    GIA certified cushion brilliant diamonds 1.66 cts (I color, SI2 clarity) and 2.03 cts (K color, SI1 clarity) with a fanned earring with round diamonds and blue sapphiers in platinum.GIA CertificateGIA Certificate
    G&S Price: $14,500.00
    Item #:S514844
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    GIA Certified round brilliant cut diamond 0.74 cts set in Scot Kay platinum engagement ring

    GIA Certified 0.74 ct (D color, SI1 clarity) Round Brilliant Cut diamond set in a Scott Kay platinum setting featuring an intricate engraving design along side and two accent diamond on basket. Size 6.75. Width at the shank is 0.08 inches (2mm), width at the top is 0.22 inches (5.7mm).

    This GIA certified ring is currently size 6.75 and some items can be sized up or down, please ask! It weighs 3.7 pennyweights and is Platinum.GIA Certificate
    G&S Price: $5,850.00
    Item #:S514849
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    GIA certified engagement diamond ring 1.51 cts in 18k yellow gold

    GIA certified engagement sparkling mounted diamond ring 1.51 cts G color, SI2 clarity center stone with 4 side diamonds - 2 side approx. 0.20 cts each, 2 side approx. 0.05 cts in 18k yellow gold. Size 7.75

    This GIA certified ring is currently size 7.75 and some items can be sized up or down, please ask! It weighs 5.8 pennyweights and is 18k.
    G&S Price: $8,900.00
    Item #:S515154
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