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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 7388356202

Certificate GIA 7388356202

Diamond specifications and retailer prices

From $643 AUD
As of November 4, 2026
Save $961 AUD (60%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $2,668 AUD at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 0.51ct natural round diamond

This 0.51ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 7388356202. Listed at 10 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
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 7388356202
Dimensions5.11 × 5.10 × 3.16 mm
L/W Ratio1.00
Top View
5.11 mm5.10 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 7388356202
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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 4
Current: $2,668 AUD|Low: $536 AUD|High: $2,668 AUD|Avg: $1,124 AUD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$643 AUD
Retailer 4$707 AUD
Retailer 8$750 AUD
Retailer 9$770 AUD
Retailer 6$803 AUD
Retailer 2$851 AUD
Retailer 3$1,039 AUD
Retailer 5$1,604 AUD
NZ Jewellers$2,668 AUD

44 data points across 9 retailers

10 retailers$643 AUD to $1,604 AUD

A
Cheapest Retailer
-
$643 AUD
Final sale: no returns
A
Retailer 2
-
$707 AUD
View
Retailer 3
-
$750 AUD
View
Price last confirmed 8 days ago
A
Retailer 4
-
$750 AUD
View
A
Retailer 5
-
$803 AUD
View
Retailer 6
-
$803 AUD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$851 AUD
View
B+
Retailer 8
-
$1,039 AUD
View
B
Retailer 9
-
$1,604 AUD
View
Most Expensive
NZ Jewellers
b5cc16ca-40b4-43ec-8b14-3fefe3aec87c · Oct 27
$2,668 AUD
$1,868 USD
View
Price last confirmed 10 days ago
9 more retailers have this diamond
Prices start from $643 AUDSave up to $961 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 Round
$643 AUD