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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 $4,755 NZD
As of November 6, 2026
Save $5,802 NZD (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $10,557 NZD 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 $4,755 to $10,557, a $5,802 spread on the same certified stone. MOH London lists it at $10,557. 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: $10,557 NZD|Low: $4,710 NZD|High: $11,033 NZD|Avg: $6,651 NZD|-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$4,755 NZD
Retailer 2$4,955 NZD
Retailer 3$5,675 NZD
Retailer 8$5,763 NZD
Retailer 11$5,825 NZD
Retailer 10$6,312 NZD
Retailer 6$6,492 NZD
Retailer 4$6,619 NZD
Retailer 12$6,692 NZD
Retailer 5$7,345 NZD
Retailer 7$7,703 NZD
MOH London$10,557 NZD

29 data points across 12 retailers

16 retailers$4,755 NZD to $10,557 NZD

A
Cheapest Retailer
-
$4,755 NZD
A
Retailer 2
-
$4,955 NZD
View
B+
Retailer 3
-
$5,675 NZD
View
B+
Retailer 4
-
$5,763 NZD
View
B+
Retailer 5
-
$5,825 NZD
View
Final sale: no returns
B+
Retailer 6
-
$6,067 NZD
View
B+
Retailer 7
-
$6,070 NZD
View
Retailer 8
-
$6,312 NZD
View
Price last confirmed 8 days ago
B+
Retailer 9
-
$6,435 NZD
View
B+
Retailer 10
-
$6,492 NZD
View
B+
Retailer 11
-
$6,619 NZD
View
B+
Retailer 12
-
$6,692 NZD
View
Retailer 13
-
$7,019 NZD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$7,345 NZD
View
B+
Retailer 15
-
$7,703 NZD
View
Most Expensive
B
MOH London
24DD57394 · Nov 1
$10,557 NZD
£4,608 GBP
View
15 more retailers have this diamond
Prices start from $4,755 NZDSave up to $5,802 NZD

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
$4,755 NZD