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Cushion|Natural|GIA

1.21ct J SI2 Cushion Natural Diamond

EX • J/SI2 • GIA 5413846810

Certificate GIA 5413846810

Diamond specifications and retailer prices

From £1,849 GBP
$2,477 USD
As of October 31, 2026
Save £1,090 GBP (37%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,940 GBP at Frank Darling · As of October 30, 2026
View at Frank Darling

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5413846810. Listed at 7 retailers as of October 30, 2026, with prices from £1,849 to £2,940, a £1,090 spread on the same certified stone. Frank Darling lists it at £2,940. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5413846810
Dimensions6.37 × 5.83 × 4.04 mm
L/W Ratio1.09
Top View
6.37 mm5.83 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5413846810
Side View
Table 63.0%CrownGirdle: ThickPavilionCulet: NoneDepth 69.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,940 GBP|Low: £1,865 GBP|High: £2,940 GBP|Avg: £2,543 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3£1,890 GBP
Retailer 5£2,082 GBP
Retailer 6£2,727 GBP
Retailer 4£2,796 GBP
Retailer 2£2,840 GBP
Frank Darling£2,940 GBP

35 data points across 6 retailers

7 retailers£1,849 GBP to £2,940 GBP

B+
Cheapest Retailer
-
£1,849 GBP
$2,477 USD
B+
Retailer 2
-
£1,890 GBP
$2,533 USD
View
B+
Retailer 3
-
£1,931 GBP
$2,587 USD
View
B
Retailer 4
-
£1,976 GBP
$2,648 USD
View
Retailer 5
-
£2,082 GBP
$2,789 USD
View
Price last confirmed 56 days ago
B
Retailer 6
-
£2,840 GBP
View
Most Expensive
B
Frank Darling
CU2551MR · Oct 30
£2,940 GBP
$3,939 USD
View
6 more retailers have this diamond
Prices start from £1,849 GBPSave up to £1,090 GBP

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.

B+
1.21ct Cushion
£1,849 GBP