CaratHunter
Plans
Oval|Natural|GIA

0.51ct H SI2 Oval Natural Diamond

GD • H/SI2 • GIA 6541445225

Certificate GIA 6541445225

Diamond specifications and retailer prices

From $777 AUD
As of November 6, 2026
Save $1,167 AUD (60%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $2,644 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 SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6541445225. Listed at 12 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. 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
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6541445225
Dimensions6.39 × 4.55 × 2.65 mm
L/W Ratio1.40
Top View
6.39 mm4.55 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6541445225
Side View
Table 59.0%CrownGirdlePavilionCulet: NoneDepth 58.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $1,025 AUD|Low: $713 AUD|High: $1,969 AUD|Avg: $1,031 AUD|+5.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 8$777 AUD
Retailer 9$838 AUD
Retailer 10$838 AUD
Retailer 12$843 AUD
Retailer 2$908 AUD
Retailer 11$934 AUD
Retailer 13$974 AUD
Retailer 1$1,025 AUD
Retailer 5$1,026 AUD
Retailer 3$1,033 AUD
Retailer 4$1,035 AUD
Retailer 7$1,249 AUD
Retailer 6$1,944 AUD

41 data points across 13 retailers

12 retailers$777 AUD to $1,944 AUD

B+
Cheapest Retailer
-
$777 AUD
Final sale: no returns
B+
Retailer 2
-
$838 AUD
View
Retailer 3
-
$843 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$908 AUD
View
Price last confirmed 29 days ago
Retailer 5
-
$908 AUD
View
Price last confirmed 38 days ago
Retailer 6
-
$974 AUD
View
Price last confirmed 38 days ago
B
Retailer 7
-
$1,025 AUD
View
B
Retailer 8
-
$1,033 AUD
View
B
Retailer 9
-
$1,035 AUD
View
B
Retailer 10
-
$1,249 AUD
View
C
Retailer 11
-
$1,944 AUD
View
Most Expensive
NZ Jewellers
1b2cb95e-5a01-40bf-8121-0ef91a101cb5 · Sep 30
$2,644 AUD
$1,817 USD
View
Price last confirmed 37 days ago
11 more retailers have this diamond
Prices start from $777 AUDSave up to $1,167 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.

B+
0.51ct Oval
$777 AUD