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Round|Natural|GIA

0.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 7551317215

Certificate GIA 7551317215

Diamond specifications and retailer prices

From $698 NZD
As of November 6, 2026
Save $2,275 NZD (77%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,973 NZD at NZ Jewellers · As of November 4, 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 7551317215. Listed at 15 retailers as of November 4, 2026, with prices from $698 to $2,973, a $2,275 spread on the same certified stone. NZ Jewellers lists it at $2,973. 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
FluorescenceFaint
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 7551317215
Dimensions5.09 × 5.12 × 3.19 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Feather, Cloud
Top View
5.09 mm5.12 mm0.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 7551317215
Side View
Table 57.0%Crown 35°Girdle: THN-MEDPavilion 41.4°Culet: NDepth 62.4%

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: $2,973 NZD|Low: $698 NZD|High: $3,040 NZD|Avg: $1,228 NZD|-2.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 2$698 NZD
Retailer 3$754 NZD
Retailer 4$808 NZD
Retailer 7$916 NZD
Retailer 15$949 NZD
Retailer 5$1,012 NZD
Retailer 12$1,021 NZD
Retailer 6$1,035 NZD
Retailer 11$1,095 NZD
Retailer 9$1,171 NZD
Retailer 13$1,185 NZD
Retailer 8$1,281 NZD
Retailer 10$1,317 NZD
Retailer 14$2,190 NZD
NZ Jewellers$2,973 NZD

28 data points across 15 retailers

15 retailers$698 NZD to $2,973 NZD

A
Cheapest Retailer
-
$698 NZD
A
Retailer 2
-
$754 NZD
View
A
Retailer 3
-
$808 NZD
View
Retailer 4
-
$916 NZD
View
Price last confirmed 14 days ago
A
Retailer 5
-
$949 NZD
View
Retailer 6
-
$1,012 NZD
View
Price last confirmed 10 days ago
A
Retailer 7
-
$1,021 NZD
View
Retailer 8
-
$1,035 NZD
View
Price last confirmed 8 days ago
A
Retailer 9
-
$1,095 NZD
View
A
Retailer 10
-
$1,171 NZD
View
A
Retailer 11
-
$1,185 NZD
View
B+
Retailer 12
-
$1,281 NZD
View
B+
Retailer 13
-
$1,317 NZD
View
B
Retailer 14
-
$2,190 NZD
View
Most Expensive
B
NZ Jewellers
5725664b-4f38-49c7-bb37-be002fbda403 · Nov 4
$2,973 NZD
$1,648 USD
View
14 more retailers have this diamond
Prices start from $698 NZDSave up to $2,275 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
$698 NZD