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Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

GD • H/SI1 • GIA 2556444651

Certificate GIA 2556444651

Diamond specifications and retailer prices

From $446 USD
As of November 6, 2026
Save $1,347 USD (75%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $1,793 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

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 standard cut grade stated by the retailer rather than the lab and certified by GIA 2556444651. Listed at 21 retailers as of November 5, 2026, with prices from $446 to $1,793, a $1,347 spread on the same certified stone. NZ Jewellers lists it at $1,793. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
H
Color
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556444651
Dimensions6.35 × 4.50 × 2.87 mm
L/W Ratio1.41
Girdle conditionFaceted
Key to symbols
Feather, Twinning Wisp, Crystal, Cloud
Top View
6.35 mm4.50 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 2556444651
Side View
Table 58.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 63.7%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $1,793 USD|Low: $446 USD|High: $1,793 USD|Avg: $778 USD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 6, 2026
Retailer 2$446 USD
Retailer 8$527 USD
Retailer 3$572 USD
Retailer 13$594 USD
Retailer 5$616 USD
Retailer 11$616 USD
Retailer 18$660 USD
Retailer 19$663 USD
Retailer 10$667 USD
Retailer 15$694 USD
Retailer 12$698 USD
Retailer 6$703 USD
Retailer 7$719 USD
Retailer 4$765 USD
Retailer 9$813 USD
Retailer 14$843 USD
Retailer 16$882 USD
Retailer 17$1,320 USD
NZ Jewellers$1,793 USD

23 data points across 19 retailers

21 retailers$446 USD to $1,793 USD

A
Cheapest Retailer
-
$446 USD
B+
Retailer 2
-
$486 USD
View
B+
Retailer 3
-
$527 USD
View
Final sale: no returns
B+
Retailer 4
-
$572 USD
View
B+
Retailer 5
-
$594 USD
View
B+
Retailer 6
-
$616 USD
View
Retailer 7
-
$616 USD
View
Price last confirmed 8 days ago
B+
Retailer 8
-
$660 USD
View
B+
Retailer 9
-
$663 USD
View
B+
Retailer 10
-
$667 USD
View
B
Retailer 11
-
$694 USD
View
B+
Retailer 12
-
$698 USD
View
B
Retailer 13
-
$703 USD
View
B
Retailer 14
-
$719 USD
View
B
Retailer 15
-
$765 USD
View
B
Retailer 16
-
$813 USD
View
B
Retailer 17
-
$843 USD
View
Retailer 18
-
$868 USD
View
Price last confirmed 33 days ago
B
Retailer 19
-
$882 USD
View
C
Retailer 20
-
$1,320 USD
View
Most Expensive
C
NZ Jewellers
dd1940f1-609e-45b9-ade2-9c6db32196c8 · Nov 5
$1,793 USD
View
20 more retailers have this diamond
Prices start from $446 USDSave up to $1,347 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
$446 USD