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Cushion|Natural|GIA

1.21ct E SI1 Cushion Natural Diamond

ID • E/SI1 • GIA 6551518018

Certificate GIA 6551518018

Diamond specifications and retailer prices

From $3,378 SGD
As of November 6, 2026
Save $4,122 SGD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $7,500 SGD at MOH London · As of November 1, 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 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 6551518018. Listed at 16 retailers as of November 1, 2026, with prices from $3,378 to $7,500, a $4,122 spread on the same certified stone. MOH London lists it at $7,500. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551518018
Dimensions7.09 × 5.46 × 3.75 mm
L/W Ratio1.30
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle, Indented Natural
Top View
7.09 mm5.46 mm1.21 ctE / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6551518018
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 68.7%

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 6
Current: $7,500 SGD|Low: $3,346 SGD|High: $7,839 SGD|Avg: $4,725 SGD|-4.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 9$3,378 SGD
Retailer 2$3,521 SGD
Retailer 3$4,032 SGD
Retailer 8$4,095 SGD
Retailer 11$4,138 SGD
Retailer 10$4,484 SGD
Retailer 6$4,612 SGD
Retailer 4$4,702 SGD
Retailer 12$4,755 SGD
Retailer 5$5,219 SGD
Retailer 7$5,472 SGD
MOH London$7,500 SGD

29 data points across 12 retailers

16 retailers$3,378 SGD to $7,500 SGD

A
Cheapest Retailer
-
$3,378 SGD
A
Retailer 2
-
$3,521 SGD
View
B+
Retailer 3
-
$4,032 SGD
View
B+
Retailer 4
-
$4,095 SGD
View
B+
Retailer 5
-
$4,138 SGD
View
Final sale: no returns
B+
Retailer 6
-
$4,310 SGD
View
B+
Retailer 7
-
$4,313 SGD
View
Retailer 8
-
$4,484 SGD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$4,571 SGD
View
B+
Retailer 10
-
$4,612 SGD
View
B+
Retailer 11
-
$4,702 SGD
View
B+
Retailer 12
-
$4,755 SGD
View
Retailer 13
-
$4,987 SGD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$5,219 SGD
View
B+
Retailer 15
-
$5,472 SGD
View
Most Expensive
B
MOH London
24DD57394 · Nov 1
$7,500 SGD
£4,608 GBP
View
15 more retailers have this diamond
Prices start from $3,378 SGDSave up to $4,122 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
$3,378 SGD