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Radiant|Natural|GIA

1.31ct K SI1 Radiant Natural Diamond

ID • K/SI1 • GIA 11

Certificate GIA 11

Diamond specifications and retailer prices

From $3,110 SGD
As of November 4, 2026
Save $3,956 SGD (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,067 SGD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.31ct natural radiant diamond

This 1.31ct natural radiant sits in the one-and-a-quarter to one-and-a-half carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 8 retailers as of November 4, 2026, with prices from $3,110 to $7,067, a $3,956 spread on the same certified stone. NZ Jewellers lists it at $7,067. 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

1.31
Carat
K
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 11
Dimensions7.33 × 5.49 × 3.75 mm
L/W Ratio1.34
Top View
7.33 mm5.49 mm1.31 ctK / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 11
Side View
Table 68.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 68.3%

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 4
Current: $7,067 SGD|Low: $3,110 SGD|High: $7,067 SGD|Avg: $4,127 SGD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
September 30, 2026
Retailer 8$3,110 SGD
Retailer 4$3,201 SGD
Retailer 5$3,674 SGD
Retailer 6$3,674 SGD
Retailer 2$3,817 SGD
Retailer 3$3,972 SGD
Retailer 7$4,240 SGD
NZ Jewellers$7,067 SGD

3 data points across 8 retailers

8 retailers$3,110 SGD to $7,067 SGD

A
Cheapest Retailer
-
$3,110 SGD
A
Retailer 2
-
$3,201 SGD
View
Retailer 3
-
$3,674 SGD
View
Price last confirmed 9 days ago
A
Retailer 4
-
$3,674 SGD
View
A
Retailer 5
-
$3,817 SGD
View
B+
Retailer 6
-
$3,972 SGD
View
B+
Retailer 7
-
$4,240 SGD
View
Most Expensive
B
NZ Jewellers
cb41615b-a6f8-4181-bfe7-05febe830fb7 · Nov 5
$7,067 SGD
$5,514 USD
View
7 more retailers have this diamond
Prices start from $3,110 SGDSave up to $3,956 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
1.31ct Radiant
$3,110 SGD