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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 $732 NZD
As of November 6, 2026
Save $1,642 NZD (69%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $3,231 NZD 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: $732 NZD|Low: $732 NZD|High: $2,406 NZD|Avg: $1,278 NZD|-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$732 NZD
Retailer 9$951 NZD
Retailer 6$1,037 NZD
Retailer 3$1,057 NZD
Retailer 8$1,189 NZD
Retailer 2$1,223 NZD
Retailer 4$1,243 NZD
Retailer 5$1,342 NZD
Retailer 7$2,374 NZD

29 data points across 9 retailers

15 retailers$732 NZD to $2,374 NZD

A
Cheapest Retailer
-
$732 NZD
A
Retailer 2
-
$853 NZD
View
A
Retailer 3
-
$951 NZD
View
Final sale: no returns
A
Retailer 4
-
$1,037 NZD
View
A
Retailer 5
-
$1,057 NZD
View
A
Retailer 6
-
$1,109 NZD
View
Retailer 7
-
$1,189 NZD
View
Price last confirmed 10 days ago
B+
Retailer 8
-
$1,189 NZD
View
B+
Retailer 9
-
$1,223 NZD
View
B+
Retailer 10
-
$1,228 NZD
View
B+
Retailer 11
-
$1,243 NZD
View
B+
Retailer 12
-
$1,342 NZD
View
B
Retailer 13
-
$1,595 NZD
View
B
Retailer 14
-
$2,374 NZD
View
Most Expensive
NZ Jewellers
fb916022-03e4-4531-afed-4b3324334911 · Oct 27
$3,231 NZD
$1,791 USD
View
Price last confirmed 10 days ago
14 more retailers have this diamond
Prices start from $732 NZDSave up to $1,642 NZD

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
$732 NZD