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Oval|Natural|GIA

0.51ct H SI2 Oval Natural Diamond

GD • H/SI2 • GIA 1525115355

Certificate GIA 1525115355

Diamond specifications and retailer prices

From $750 AUD
As of November 6, 2026
Save $1,126 AUD (60%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $2,547 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 1525115355. Listed at 11 retailers as of November 2, 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
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1525115355
Dimensions6.86 × 4.35 × 2.69 mm
L/W Ratio1.58
Key to symbols
Crystal, Feather
Top View
6.86 mm4.35 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 1525115355
Side View
Table 54.0%CrownGirdle: Very ThickPavilionCulet: NoneDepth 61.8%

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: $1,016 AUD|Low: $687 AUD|High: $1,898 AUD|Avg: $1,028 AUD|+5.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 5$750 AUD
Retailer 8$812 AUD
Retailer 10$875 AUD
Retailer 6$905 AUD
Retailer 2$913 AUD
Retailer 9$937 AUD
Retailer 1$1,016 AUD
Retailer 7$1,062 AUD
Retailer 4$1,205 AUD
Retailer 3$1,876 AUD

41 data points across 10 retailers

11 retailers$750 AUD to $1,876 AUD

B+
Cheapest Retailer
-
$750 AUD
Final sale: no returns
Retailer 2
-
$812 AUD
View
Price last confirmed 29 days ago
Retailer 3
-
$875 AUD
View
Price last confirmed 29 days ago
Retailer 4
-
$875 AUD
View
Price last confirmed 38 days ago
B+
Retailer 5
-
$913 AUD
View
Retailer 6
-
$937 AUD
View
Price last confirmed 38 days ago
B
Retailer 7
-
$1,003 AUD
View
B
Retailer 8
-
$1,016 AUD
View
B
Retailer 9
-
$1,205 AUD
View
C
Retailer 10
-
$1,876 AUD
View
Most Expensive
NZ Jewellers
16861eeb-55f2-43ac-b2ba-983adf7bd2fb · Sep 30
$2,547 AUD
$1,750 USD
View
Price last confirmed 37 days ago
10 more retailers have this diamond
Prices start from $750 AUDSave up to $1,126 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
$750 AUD