Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6561556478

Certificate GIA 6561556478

Diamond specifications and retailer prices

From $391 USD
As of November 5, 2026
Save $441 USD (53%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $832 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6561556478. Listed at 9 retailers as of November 5, 2026, with prices from $391 to $832, a $441 spread on the same certified stone. Frank Darling lists it at $832. 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
H
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6561556478
Dimensions6.28 × 4.51 × 2.82 mm
L/W Ratio1.39
Culet sizeNone
Top View
6.28 mm4.51 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6561556478
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.6%

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 5
Current: $832 USD|Low: $390 USD|High: $832 USD|Avg: $573 USD
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 2$391 USD
Retailer 7$400 USD
Retailer 4$469 USD
Retailer 8$519 USD
Retailer 6$559 USD
Retailer 5$610 USD
Retailer 3$689 USD
Frank Darling$832 USD

10 data points across 8 retailers

9 retailers$391 USD to $832 USD

A
Cheapest Retailer
-
$391 USD
A
Retailer 2
-
$400 USD
View
A
Retailer 3
-
$420 USD
View
A
Retailer 4
-
$469 USD
View
A
Retailer 5
-
$519 USD
View
A
Retailer 6
-
$559 USD
View
B+
Retailer 7
-
$610 USD
View
B+
Retailer 8
-
$689 USD
View
Most Expensive
B
Frank Darling
2701750HK · Nov 6
$832 USD
View
8 more retailers have this diamond
Prices start from $391 USDSave up to $441 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
$391 USD