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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 $2,636 USD
As of November 6, 2026
Save $3,216 USD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,852 USD 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 $2,636 to $5,852, a $3,216 spread on the same certified stone. MOH London lists it at $5,852. 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
Color
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: $5,852 USD|Low: $2,611 USD|High: $6,116 USD|Avg: $3,687 USD|-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$2,636 USD
Retailer 2$2,747 USD
Retailer 3$3,146 USD
Retailer 8$3,195 USD
Retailer 11$3,229 USD
Retailer 10$3,499 USD
Retailer 6$3,599 USD
Retailer 4$3,669 USD
Retailer 12$3,710 USD
Retailer 5$4,072 USD
Retailer 7$4,270 USD
MOH London$5,852 USD

29 data points across 12 retailers

16 retailers$2,636 USD to $5,852 USD

A
Cheapest Retailer
-
$2,636 USD
A
Retailer 2
-
$2,747 USD
View
B+
Retailer 3
-
$3,146 USD
View
B+
Retailer 4
-
$3,195 USD
View
B+
Retailer 5
-
$3,229 USD
View
Final sale: no returns
B+
Retailer 6
-
$3,363 USD
View
B+
Retailer 7
-
$3,365 USD
View
Retailer 8
-
$3,499 USD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$3,567 USD
View
B+
Retailer 10
-
$3,599 USD
View
B+
Retailer 11
-
$3,669 USD
View
B+
Retailer 12
-
$3,710 USD
View
Retailer 13
-
$3,891 USD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$4,072 USD
View
B+
Retailer 15
-
$4,270 USD
View
Most Expensive
B
MOH London
24DD57394 · Nov 1
$5,852 USD
£4,608 GBP
View
15 more retailers have this diamond
Prices start from $2,636 USDSave up to $3,216 USD

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
$2,636 USD