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Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5513610130

Certificate GIA 5513610130

Diamond specifications and retailer prices

From $2,423 AUD
$1,698 USD
As of November 1, 2026
Save $2,606 AUD (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $5,029 AUD 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 J 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 5513610130. Listed at 12 retailers as of November 1, 2026, with prices from $2,423 to $5,029, a $2,606 spread on the same certified stone. MOH London lists it at $5,029. 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
J
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40°
Pavilion angle36.99°
OriginNatural
Grading LabGIA
CertificateGIA 5513610130
Dimensions6.31 × 5.80 × 3.99 mm
L/W Ratio1.09
Top View
6.31 mm5.80 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5513610130
Side View
Table 62.0%Crown 40°Girdle: STK-VTKPavilion 36.99°Culet: NoneDepth 68.8%

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 1
Current: $5,029 AUD|Low: $2,259 AUD|High: $5,226 AUD|Avg: $3,303 AUD|-2.7%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 5$2,423 AUD
Retailer 9$2,426 AUD
Retailer 6$2,614 AUD
Retailer 2$2,800 AUD
Retailer 3$2,957 AUD
Retailer 8$3,058 AUD
Retailer 7$3,239 AUD
Retailer 10$3,239 AUD
Retailer 11$3,339 AUD
Retailer 4$3,921 AUD
MOH London$5,029 AUD

35 data points across 11 retailers

12 retailers$2,423 AUD to $5,029 AUD

A
Cheapest Retailer
-
$2,423 AUD
$1,698 USD
A
Retailer 2
-
$2,426 AUD
$1,700 USD
View
Final sale: no returns
B+
Retailer 3
-
$2,614 AUD
$1,832 USD
View
B+
Retailer 4
-
$2,616 AUD
View
B+
Retailer 5
-
$2,800 AUD
£1,545 GBP
View
B+
Retailer 6
-
$2,957 AUD
View
B+
Retailer 7
-
$3,058 AUD
$2,143 USD
View
B
Retailer 8
-
$3,239 AUD
$2,270 USD
View
B
Retailer 9
-
$3,239 AUD
$2,270 USD
View
B
Retailer 10
-
$3,339 AUD
$2,340 USD
View
B
Retailer 11
-
$3,921 AUD
€2,617 EUR
View
Most Expensive
B
MOH London
E8E9572A0 · Nov 1
$5,029 AUD
£2,775 GBP
View
11 more retailers have this diamond
Prices start from $2,423 AUDSave up to $2,606 AUD

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
$2,423 AUD