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Radiant|Natural|GIA

1.21ct I SI1 Radiant Natural Diamond

EX • I/SI1 • GIA 1548532980

Certificate GIA 1548532980

Diamond specifications and retailer prices

From $2,670 SGD
£1,645 GBP
As of November 2, 2026
Save $2,152 SGD (45%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,823 SGD at NZ Jewellers · As of September 29, 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1548532980. Listed at 9 retailers as of October 29, 2026, with a 81% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle44.82°
Pavilion angle30.69°
OriginNatural
Grading LabGIA
CertificateGIA 1548532980
Dimensions6.71 × 5.25 × 3.65 mm
L/W Ratio1.28
Girdle conditionThick
Key to symbols
Twinning Wisp, Feather, Crystal
Top View
6.71 mm5.25 mm1.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1548532980
Side View
Table 65.0%Crown 44.82°GirdlePavilion 30.69°CuletDepth 69.5%

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 2
Current: $2,670 SGD|Low: $2,669 SGD|High: $4,939 SGD|Avg: $3,462 SGD|-3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 1$2,670 SGD
Retailer 3$2,761 SGD
Retailer 6$3,226 SGD
Retailer 5$3,256 SGD
Retailer 4$3,425 SGD
Retailer 7$3,435 SGD
Retailer 2$4,822 SGD

37 data points across 7 retailers

9 retailers$2,670 SGD to $4,822 SGD

A
Cheapest Retailer
-
$2,670 SGD
£1,645 GBP
A
Retailer 2
-
$2,761 SGD
$2,160 USD
View
Retailer 3
-
$2,786 SGD
$2,179 USD
View
Price last confirmed 37 days ago
Retailer 4
-
$2,786 SGD
$2,179 USD
View
Price last confirmed 25 days ago
Retailer 5
-
$2,913 SGD
$2,279 USD
View
Price last confirmed 32 days ago
Retailer 6
-
$3,425 SGD
A$4,122 AUD
View
Price last confirmed 26 days ago
B
Retailer 7
-
$4,822 SGD
£2,970 GBP
View
Retailer 8
-
$5,823 SGD
$4,555 USD
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
a87d2050-7c7a-48c5-9bc4-636ec81b0fa6 · Sep 29
$5,823 SGD
$4,555 USD
View
Price last confirmed 33 days ago
8 more retailers have this diamond
Prices start from $2,670 SGDSave up to $2,152 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
1.21ct Radiant
$2,670 SGD