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Cushion|Natural|GIA

1.21ct F SI1 Cushion Natural Diamond

EX • F/SI1 • GIA 6545899030

Certificate GIA 6545899030

Diamond specifications and retailer prices

From $3,163 SGD
As of November 7, 2026
Save $2,750 SGD (47%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,913 SGD at MOH London · As of November 7, 2026
View at MOH London

About this 1.21ct natural cushion diamond

This 1.21ct natural cushion sits in the classic one-carat band, graded F 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 6545899030. Listed at 7 retailers as of November 7, 2026, with prices from $3,163 to $5,913, a $2,750 spread on the same certified stone. MOH London lists it at $5,913. 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
F
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.88°
Pavilion angle31.2°
OriginNatural
Grading LabGIA
CertificateGIA 6545899030
Dimensions6.38 × 5.82 × 3.83 mm
L/W Ratio1.10
Top View
6.38 mm5.82 mm1.21 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6545899030
Side View
Table 63.0%Crown 36.88°GirdlePavilion 31.2°CuletDepth 65.7%

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 7
Current: $5,913 SGD|Low: $3,095 SGD|High: $6,017 SGD|Avg: $3,971 SGD|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 7, 2026
Retailer 3$3,163 SGD
Retailer 2$3,313 SGD
Retailer 5$3,396 SGD
Retailer 6$3,801 SGD
Retailer 4$4,290 SGD
MOH London$5,913 SGD

39 data points across 6 retailers

7 retailers$3,163 SGD to $5,913 SGD

A
Cheapest Retailer
-
$3,163 SGD
A
Retailer 2
-
$3,313 SGD
View
B+
Retailer 3
-
$3,396 SGD
View
B+
Retailer 4
-
$3,581 SGD
View
Retailer 5
-
$3,801 SGD
View
Price last confirmed 31 days ago
B
Retailer 6
-
$4,290 SGD
View
Most Expensive
B
MOH London
EEA6D9B22 · Nov 7
$5,913 SGD
£3,633 GBP
View
6 more retailers have this diamond
Prices start from $3,163 SGDSave up to $2,750 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 Cushion
$3,163 SGD