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Round|Natural|GIA

0.51ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 1535044773

Certificate GIA 1535044773

Diamond specifications and retailer prices

From $580 AUD
As of November 6, 2026
Save $1,300 AUD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,558 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 1535044773. Listed at 15 retailers as of November 4, 2026, with a 224% 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 angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1535044773
Dimensions5.11 × 5.09 × 3.19 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Cloud
Top View
5.11 mm5.09 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1535044773
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.6%

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: $580 AUD|Low: $580 AUD|High: $1,906 AUD|Avg: $1,012 AUD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$580 AUD
Retailer 9$753 AUD
Retailer 6$821 AUD
Retailer 3$837 AUD
Retailer 8$941 AUD
Retailer 2$969 AUD
Retailer 4$984 AUD
Retailer 5$1,063 AUD
Retailer 7$1,880 AUD

29 data points across 9 retailers

15 retailers$580 AUD to $1,880 AUD

A
Cheapest Retailer
-
$580 AUD
A
Retailer 2
-
$676 AUD
View
A
Retailer 3
-
$753 AUD
View
Final sale: no returns
A
Retailer 4
-
$821 AUD
View
A
Retailer 5
-
$837 AUD
View
A
Retailer 6
-
$879 AUD
View
Retailer 7
-
$941 AUD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
$941 AUD
View
B+
Retailer 9
-
$969 AUD
View
B+
Retailer 10
-
$973 AUD
View
B+
Retailer 11
-
$984 AUD
View
B+
Retailer 12
-
$1,063 AUD
View
B
Retailer 13
-
$1,263 AUD
View
B
Retailer 14
-
$1,880 AUD
View
Most Expensive
NZ Jewellers
fb916022-03e4-4531-afed-4b3324334911 · Oct 27
$2,558 AUD
$1,791 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from $580 AUDSave up to $1,300 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
$580 AUD