Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6555499715

Certificate GIA 6555499715

Diamond specifications and retailer prices

From $547 USD
As of November 6, 2026
Save $820 USD (60%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $1,860 USD at NZ Jewellers · As of September 30, 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 top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555499715. Listed at 15 retailers as of November 4, 2026, with a 150% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6555499715
Dimensions6.50 × 4.50 × 2.77 mm
L/W Ratio1.44
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Twinning Wisp, Feather
Top View
6.50 mm4.50 mm0.51 ctH / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6555499715
Side View
Table 56.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 61.5%

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: $872 USD|Low: $547 USD|High: $1,386 USD|Avg: $855 USD|+1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6$547 USD
Retailer 8$655 USD
Retailer 2$721 USD
Retailer 5$785 USD
Retailer 1$872 USD
Retailer 7$892 USD
Retailer 4$915 USD
Retailer 3$1,367 USD

46 data points across 8 retailers

15 retailers$547 USD to $1,367 USD

A
Cheapest Retailer
-
$547 USD
Final sale: no returns
Retailer 2
-
$593 USD
View
Price last confirmed 29 days ago
Retailer 3
-
$639 USD
View
Price last confirmed 29 days ago
Retailer 4
-
$639 USD
View
Price last confirmed 38 days ago
Retailer 5
-
$640 USD
View
Price last confirmed 11 days ago
Retailer 6
-
$684 USD
View
Price last confirmed 67 days ago
Retailer 7
-
$684 USD
View
Price last confirmed 38 days ago
B+
Retailer 8
-
$721 USD
View
B
Retailer 9
-
$785 USD
View
B+
Retailer 10
-
$872 USD
View
Retailer 11
-
$892 USD
View
Price last confirmed 33 days ago
B+
Retailer 12
-
$915 USD
View
B
Retailer 13
-
$1,367 USD
View
Retailer 14
-
$1,860 USD
View
Price last confirmed 69 days ago
Most Expensive
NZ Jewellers
14c792f6-0078-4d74-b977-0c16cc58ec11 · Sep 30
$1,860 USD
View
Price last confirmed 37 days ago
14 more retailers have this diamond
Prices start from $547 USDSave up to $820 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
$547 USD