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Radiant|Natural|GIA

1.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 6551278496

Certificate GIA 6551278496

Diamond specifications and retailer prices

From $4,847 SGD
£2,985 GBP
As of November 2, 2026
Save $3,869 SGD (44%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $8,716 SGD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded H 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 6551278496. Listed at 6 retailers as of October 30, 2026, with prices from $4,847 to $8,716, a $3,869 spread on the same certified stone. NZ Jewellers lists it at $8,716. 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

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle50.5°
Pavilion angle35.96°
OriginNatural
Grading LabGIA
CertificateGIA 6551278496
Dimensions7.63 × 5.69 × 3.93 mm
L/W Ratio1.34
Girdle conditionThick
Key to symbols
Crystal, Feather, Cloud
Top View
7.63 mm5.69 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551278496
Side View
Table 69.0%Crown 50.5°Girdle: ThickPavilion 35.96°Culet: NoneDepth 69.0%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $8,716 SGD|Low: $4,635 SGD|High: $8,806 SGD|Avg: $6,013 SGD|-1.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 7$4,635 SGD
Retailer 2$4,847 SGD
Retailer 4$5,004 SGD
Retailer 6$5,004 SGD
Retailer 5$5,189 SGD
Retailer 8$5,528 SGD
Retailer 3$8,412 SGD
NZ Jewellers$8,716 SGD

33 data points across 8 retailers

6 retailers$4,847 SGD to $8,716 SGD

A
Cheapest Retailer
-
$4,847 SGD
£2,985 GBP
A
Retailer 2
-
$5,004 SGD
$3,914 USD
View
A
Retailer 3
-
$5,004 SGD
$3,914 USD
View
A
Retailer 4
-
$5,189 SGD
$4,059 USD
View
B+
Retailer 5
-
$8,412 SGD
£5,181 GBP
View
Most Expensive
B+
NZ Jewellers
cc57a906-508e-483f-9f0b-71230cce7ed2 · Oct 30
$8,716 SGD
$6,818 USD
View
5 more retailers have this diamond
Prices start from $4,847 SGDSave up to $3,869 SGD

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
1.51ct Radiant
$4,847 SGD