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Radiant|Natural|GIA

0.51ct G SI2 Radiant Natural Diamond

ID • G/SI2 • GIA 2556750688

Certificate GIA 2556750688

Diamond specifications and retailer prices

From $795 NZD
$448 USD
As of November 1, 2026
Save $2,294 NZD (74%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $3,089 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556750688. Listed at 17 retailers as of October 30, 2026, with prices from $795 to $3,089, a $2,294 spread on the same certified stone. NZ Jewellers lists it at $3,089. 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
G
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle53.9°
OriginNatural
Grading LabGIA
CertificateGIA 2556750688
Dimensions5.96 × 3.87 × 2.61 mm
L/W Ratio1.54
Girdle conditionPolished
Culet sizeNone
Top View
5.96 mm3.87 mm0.51 ctG / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556750688
Side View
Table 66.0%Crown 36°Girdle: MED-STKPavilion 53.9°Culet: NoneDepth 67.5%

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 1
Current: $3,089 NZD|Low: $701 NZD|High: $3,192 NZD|Avg: $1,227 NZD|-3.2%
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
Retailer 16
Retailer 17
November 2, 2026
Retailer 15$795 NZD
Retailer 6$823 NZD
Retailer 12$843 NZD
Retailer 4$892 NZD
Retailer 9$908 NZD
Retailer 7$962 NZD
Retailer 8$962 NZD
Retailer 3$1,029 NZD
Retailer 14$1,038 NZD
Retailer 5$1,081 NZD
Retailer 2$1,177 NZD
Retailer 16$1,234 NZD
Retailer 11$1,244 NZD
Retailer 17$1,253 NZD
Retailer 10$1,328 NZD
Retailer 13$2,276 NZD
NZ Jewellers$3,089 NZD

35 data points across 17 retailers

17 retailers$795 NZD to $3,089 NZD

A
Cheapest Retailer
-
$795 NZD
$448 USD
A
Retailer 2
-
$823 NZD
$464 USD
View
Final sale: no returns
A
Retailer 3
-
$843 NZD
$475 USD
View
A
Retailer 4
-
$892 NZD
$503 USD
View
A
Retailer 5
-
$908 NZD
HK$4,000 HKD
View
A
Retailer 6
-
$962 NZD
$542 USD
View
A
Retailer 7
-
$962 NZD
$542 USD
View
A
Retailer 8
-
$1,029 NZD
$580 USD
View
A
Retailer 9
-
$1,038 NZD
$585 USD
View
A
Retailer 10
-
$1,081 NZD
$609 USD
View
A
Retailer 11
-
$1,177 NZD
£522 GBP
View
A
Retailer 12
-
$1,234 NZD
£548 GBP
View
A
Retailer 13
-
$1,244 NZD
£552 GBP
View
A
Retailer 14
-
$1,253 NZD
$706 USD
View
B+
Retailer 15
-
$1,328 NZD
€713 EUR
View
B
Retailer 16
-
$2,276 NZD
£1,010 GBP
View
Most Expensive
B
NZ Jewellers
e6671163-bf29-4252-8837-769f134d2016 · Oct 30
$3,089 NZD
$1,741 USD
View
16 more retailers have this diamond
Prices start from $795 NZDSave up to $2,294 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 Radiant
$795 NZD