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Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

VG • J/SI1 • GIA 2436738919

Certificate GIA 2436738919

Diamond specifications and retailer prices

From £1,245 GBP
$1,668 USD
As of November 1, 2026
Save £1,454 GBP (54%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,699 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2436738919. Listed at 7 retailers as of October 30, 2026, with prices from £1,245 to £2,699, a £1,454 spread on the same certified stone. Frank Darling lists it at £2,699. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
J
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.2°
Pavilion angle64.9°
OriginNatural
Grading LabGIA
CertificateGIA 2436738919
Dimensions5.90 × 5.63 × 3.99 mm
L/W Ratio1.05
Top View
5.90 mm5.63 mm1.21 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2436738919
Side View
Table 69.0%Crown 39.2°Girdle: THK-VTKPavilion 64.9°Culet: NoneDepth 70.9%

Caratlytics Score

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

Price History

Last verified: Nov 1
Current: £2,699 GBP|Low: £1,245 GBP|High: £2,699 GBP|Avg: £1,652 GBP
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 6£1,245 GBP
Retailer 4£1,253 GBP
Retailer 5£1,263 GBP
Retailer 3£1,299 GBP
Retailer 2£1,900 GBP
Frank Darling£2,699 GBP

36 data points across 6 retailers

7 retailers£1,245 GBP to £2,699 GBP

B+
Cheapest Retailer
-
£1,245 GBP
$1,668 USD
B+
Retailer 2
-
£1,253 GBP
$1,679 USD
View
B+
Retailer 3
-
£1,263 GBP
$1,692 USD
View
B+
Retailer 4
-
£1,299 GBP
$1,740 USD
View
B+
Retailer 5
-
£1,305 GBP
A$2,689 AUD
View
B
Retailer 6
-
£1,900 GBP
View
Most Expensive
C
Frank Darling
CU2552MR · Oct 30
£2,699 GBP
$3,616 USD
View
6 more retailers have this diamond
Prices start from £1,245 GBPSave up to £1,454 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
£1,245 GBP