CaratHunter
Plans
Oval|Natural|GIA

0.51ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 6555499715

Certificate GIA 6555499715

Diamond specifications and retailer prices

From $796 AUD
As of November 6, 2026
Save $1,186 AUD (60%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $2,707 AUD 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 18 retailers as of November 6, 2026, with a 149% 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
Colour
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: $1,207 AUD|Low: $796 AUD|High: $2,017 AUD|Avg: $1,243 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 11$796 AUD
Retailer 3$953 AUD
Retailer 4$975 AUD
Retailer 7$1,049 AUD
Retailer 10$1,142 AUD
Retailer 1$1,207 AUD
Retailer 5$1,269 AUD
Retailer 8$1,269 AUD
Retailer 2$1,298 AUD
Retailer 9$1,332 AUD
Retailer 6$1,982 AUD

46 data points across 11 retailers

18 retailers$796 AUD to $1,982 AUD

A
Cheapest Retailer
-
$796 AUD
Final sale: no returns
Retailer 2
-
$863 AUD
View
Price last confirmed 30 days ago
Retailer 3
-
$930 AUD
View
Price last confirmed 30 days ago
Retailer 4
-
$930 AUD
View
Price last confirmed 39 days ago
Retailer 5
-
$931 AUD
View
Price last confirmed 12 days ago
B+
Retailer 6
-
$975 AUD
View
Retailer 7
-
$995 AUD
View
Price last confirmed 68 days ago
Retailer 8
-
$995 AUD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
$1,049 AUD
View
B
Retailer 10
-
$1,142 AUD
View
B
Retailer 11
-
$1,207 AUD
View
B
Retailer 12
-
$1,269 AUD
View
B+
Retailer 13
-
$1,269 AUD
View
Retailer 14
-
$1,298 AUD
View
Price last confirmed 34 days ago
B
Retailer 15
-
$1,332 AUD
View
B
Retailer 16
-
$1,982 AUD
View
Retailer 17
-
$2,707 AUD
View
Price last confirmed 70 days ago
Most Expensive
NZ Jewellers
14c792f6-0078-4d74-b977-0c16cc58ec11 · Sep 30
$2,707 AUD
$1,860 USD
View
Price last confirmed 38 days ago
17 more retailers have this diamond
Prices start from $796 AUDSave up to $1,186 AUD

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
$796 AUD