CaratHunter
Plans
Cushion|Natural|GIA

1.21ct J SI1 Cushion Natural Diamond

EX • J/SI1 • GIA 5513610130

Certificate GIA 5513610130

Diamond specifications and retailer prices

From £1,267 GBP
$1,698 USD
As of October 30, 2026
Save £1,363 GBP (52%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,630 GBP 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 October 30, 2026, with prices from £1,267 to £2,630, a £1,363 spread on the same certified stone. MOH London lists it at £2,630. 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: Oct 30
Current: £2,630 GBP|Low: £1,181 GBP|High: £2,734 GBP|Avg: £1,728 GBP|-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 1, 2026
Retailer 5£1,267 GBP
Retailer 9£1,269 GBP
Retailer 6£1,367 GBP
Retailer 2£1,465 GBP
Retailer 3£1,547 GBP
Retailer 8£1,599 GBP
Retailer 7£1,694 GBP
Retailer 10£1,694 GBP
Retailer 11£1,746 GBP
Retailer 4£2,044 GBP
MOH London£2,630 GBP

35 data points across 11 retailers

12 retailers£1,267 GBP to £2,630 GBP

A
Cheapest Retailer
-
£1,267 GBP
$1,698 USD
A
Retailer 2
-
£1,269 GBP
$1,700 USD
View
Final sale: no returns
B+
Retailer 3
-
£1,367 GBP
$1,832 USD
View
B+
Retailer 4
-
£1,368 GBP
A$2,821 AUD
View
B+
Retailer 5
-
£1,465 GBP
View
B+
Retailer 6
-
£1,547 GBP
A$3,188 AUD
View
B+
Retailer 7
-
£1,599 GBP
$2,143 USD
View
B
Retailer 8
-
£1,694 GBP
$2,270 USD
View
B
Retailer 9
-
£1,694 GBP
$2,270 USD
View
B
Retailer 10
-
£1,746 GBP
$2,340 USD
View
B
Retailer 11
-
£2,044 GBP
€2,608 EUR
View
Most Expensive
B
MOH London
E8E9572A0 · Nov 1
£2,630 GBP
View
11 more retailers have this diamond
Prices start from £1,267 GBPSave up to £1,363 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.

A
1.21ct Cushion
£1,267 GBP