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Radiant|Natural|GIA

1.21ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2556128158

Certificate GIA 2556128158

Diamond specifications and retailer prices

From $3,172 SGD
As of November 7, 2026
5 retailers carry this diamond
Most expensive: $6,799 SGD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.21ct natural radiant diamond

This 1.21ct natural radiant sits in the classic one-carat band, graded I 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 2556128158. Listed at 5 retailers as of November 7, 2026. 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

1.21
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2556128158
Dimensions7.11 × 5.26 × 3.57 mm
L/W Ratio1.35
Top View
7.11 mm5.26 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2556128158
Side View
Table 66.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 67.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 7
Current: $3,071 SGD|Low: $2,394 SGD|High: $5,929 SGD|Avg: $3,457 SGD|-0.3%
Retailer 1
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
October 6, 2026
Retailer 10$2,394 SGD
Retailer 17$2,438 SGD
Retailer 11$2,454 SGD
Retailer 12$2,636 SGD
Retailer 4$2,861 SGD
Retailer 13$2,999 SGD
Retailer 15$3,027 SGD
Retailer 1$3,071 SGD
Retailer 5$3,172 SGD
Retailer 7$3,332 SGD
Retailer 8$3,332 SGD
Retailer 9$3,448 SGD
Retailer 2$3,970 SGD
Retailer 6$4,067 SGD
Retailer 14$4,562 SGD
Retailer 3$4,919 SGD
Retailer 16$5,676 SGD

12 data points across 17 retailers

5 retailers

Retailer 1
-
$2,394 SGD
Price last confirmed 33 days ago
Retailer 2
-
$2,999 SGD
View
Price last confirmed 34 days ago
B+
Retailer 3
-
$3,172 SGD
View
Retailer 4
-
$5,676 SGD
View
Price last confirmed 33 days ago
Most Expensive
NZ Jewellers
43dc02b9-5f31-4cb3-aa5c-7ce9f778202a · Sep 25
$6,799 SGD
$5,305 USD
View
Price last confirmed 42 days ago
4 more retailers have this diamond
Prices start from $3,172 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.

B+
1.21ct Radiant
$3,172 SGD