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0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 6342828860

Shape and cutting style on the report: Round brilliant

Certificate GIA 6342828860

Diamond specifications and retailer prices

From $1,371 NZD
As of November 6, 2026
Save $1,438 NZD (51%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $4,816 NZD at NZ Jewellers · As of October 30, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6342828860. Listed at 13 retailers as of November 4, 2026, with a 105% 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6342828860
Dimensions5.18 × 5.16 × 3.15 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
5.18 mm5.16 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6342828860
Side View
Table 58.0%Crown 33.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.8%

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: $4,816 NZD|Low: $1,182 NZD|High: $4,816 NZD|Avg: $2,130 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6$1,418 NZD
Retailer 4$1,479 NZD
Retailer 9$1,535 NZD
Retailer 7$1,595 NZD
Retailer 10$1,681 NZD
Retailer 8$1,771 NZD
Retailer 2$1,822 NZD
Retailer 3$2,148 NZD
Retailer 5$2,809 NZD
NZ Jewellers$4,816 NZD

42 data points across 10 retailers

13 retailers$1,371 NZD to $2,809 NZD

B+
Cheapest Retailer
-
$1,371 NZD
B+
Retailer 2
-
$1,418 NZD
View
Final sale: no returns
B+
Retailer 3
-
$1,479 NZD
View
Retailer 4
-
$1,535 NZD
View
Price last confirmed 53 days ago
Retailer 5
-
$1,535 NZD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$1,555 NZD
View
B+
Retailer 7
-
$1,595 NZD
View
Retailer 8
-
$1,771 NZD
View
Price last confirmed 10 days ago
B+
Retailer 9
-
$1,775 NZD
View
B
Retailer 10
-
$1,822 NZD
View
B
Retailer 11
-
$2,148 NZD
View
B
Retailer 12
-
$2,809 NZD
View
Most Expensive
NZ Jewellers
b884ea88-7e54-40de-8759-5eb9071228ad · Oct 30
$4,816 NZD
$2,670 USD
View
Price under review
12 more retailers have this diamond
Prices start from $1,371 NZDSave up to $1,438 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.

B+
0.51ct Round
$1,371 NZD