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Oval|Natural|GIA

0.51ct D SI2 Oval Natural Diamond

EX • D/SI2 • GIA 2566639698

Certificate GIA 2566639698

Diamond specifications and retailer prices

From $656 USD
As of November 6, 2026
Save $423 USD (39%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,079 USD at Frank Darling · As of November 6, 2026
View at Frank Darling

About this 0.51ct natural oval diamond

This 0.51ct natural oval sits in the half to three-quarter carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2566639698. Listed at 8 retailers as of November 6, 2026, with prices from $656 to $1,079, a $423 spread on the same certified stone. Frank Darling lists it at $1,079. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

0.51
Carat
D
Color
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.15°
Pavilion angle40.83°
OriginNatural
Grading LabGIA
CertificateGIA 2566639698
Dimensions6.31 × 4.53 × 2.83 mm
L/W Ratio1.39
Culet sizeNone
Top View
6.31 mm4.53 mm0.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566639698
Side View
Table 57.0%Crown 37.15°Girdle: THN-THKPavilion 40.83°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,079 USD|Low: $656 USD|High: $1,122 USD|Avg: $901 USD|-3.9%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$656 USD
Retailer 4$694 USD
Retailer 3$760 USD
Retailer 7$878 USD
Retailer 2$914 USD
Retailer 6$1,012 USD
Frank Darling$1,079 USD

20 data points across 7 retailers

8 retailers$656 USD to $1,079 USD

A
Cheapest Retailer
-
$656 USD
A
Retailer 2
-
$694 USD
View
A
Retailer 3
-
$710 USD
View
A
Retailer 4
-
$760 USD
View
B+
Retailer 5
-
$878 USD
View
B+
Retailer 6
-
$914 USD
View
B
Retailer 7
-
$1,012 USD
View
Most Expensive
B+
Frank Darling
2706634HK · Nov 6
$1,079 USD
View
7 more retailers have this diamond
Prices start from $656 USDSave up to $423 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
0.51ct Oval
$656 USD