CaratHunter
Plans
Radiant|Natural|GIA

1.21ct E SI1 Radiant Natural Diamond

EX • E/SI1 • GIA 2518450103

Certificate GIA 2518450103

Diamond specifications and retailer prices

From $4,934 SGD
As of November 6, 2026
Save $5,215 SGD (51%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $10,149 SGD at NZ Jewellers · As of November 5, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2518450103. Listed at 14 retailers as of November 5, 2026, with prices from $4,934 to $10,149, a $5,215 spread on the same certified stone. NZ Jewellers lists it at $10,149. 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
E
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle44.29°
Pavilion angle30.5°
OriginNatural
Grading LabGIA
CertificateGIA 2518450103
Dimensions6.67 × 5.23 × 3.64 mm
L/W Ratio1.28
Top View
6.67 mm5.23 mm1.21 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2518450103
Side View
Table 65.0%Crown 44.29°Girdle: THK-VTKPavilion 30.5°Culet: NoneDepth 69.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $10,149 SGD|Low: $4,934 SGD|High: $10,498 SGD|Avg: $6,772 SGD|-3.3%
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
November 7, 2026
Retailer 5$4,934 SGD
Retailer 10$5,029 SGD
Retailer 4$5,221 SGD
Retailer 12$5,415 SGD
Retailer 2$5,790 SGD
Retailer 6$5,802 SGD
Retailer 3$5,998 SGD
Retailer 13$5,998 SGD
Retailer 7$6,188 SGD
Retailer 14$6,203 SGD
Retailer 8$6,258 SGD
Retailer 11$8,509 SGD
Retailer 9$9,252 SGD
NZ Jewellers$10,149 SGD

43 data points across 14 retailers

14 retailers$4,934 SGD to $10,149 SGD

B+
Cheapest Retailer
-
$4,934 SGD
B+
Retailer 2
-
$5,029 SGD
View
B+
Retailer 3
-
$5,221 SGD
View
B+
Retailer 4
-
$5,415 SGD
View
B+
Retailer 5
-
$5,790 SGD
View
B+
Retailer 6
-
$5,802 SGD
View
B+
Retailer 7
-
$5,998 SGD
View
B+
Retailer 8
-
$5,998 SGD
View
B
Retailer 9
-
$6,188 SGD
View
B
Retailer 10
-
$6,203 SGD
View
B+
Retailer 11
-
$6,258 SGD
View
B
Retailer 12
-
$8,509 SGD
View
B
Retailer 13
-
$9,252 SGD
View
Most Expensive
B
NZ Jewellers
c41f34da-ef32-4739-bab4-64ae197ec1fe · Nov 5
$10,149 SGD
$7,919 USD
View
13 more retailers have this diamond
Prices start from $4,934 SGDSave up to $5,215 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
$4,934 SGD