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Cushion|Natural|GIA

1.21ct J SI2 Cushion Natural Diamond

ID • J/SI2 • GIA 5181963673

Certificate GIA 5181963673

Diamond specifications and retailer prices

From £2,674 GBP
$3,583 USD
As of October 31, 2026
Save £244 GBP (8%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £2,918 GBP at Jared · As of October 30, 2026
View at Jared

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 5181963673. Listed at 4 retailers as of October 30, 2026, with a relatively tight 9% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5181963673
Dimensions6.12 × 5.90 × 3.94 mm
L/W Ratio1.04
Top View
6.12 mm5.90 mm1.21 ctJ / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5181963673
Side View
Table 61.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 66.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £2,918 GBP|Low: £2,674 GBP|High: £2,926 GBP|Avg: £2,852 GBP|-0.3%
Jared
Retailer 2
Retailer 3
Retailer 4
September 26, 2026
Retailer 2£2,674 GBP
Retailer 3£2,829 GBP
Retailer 4£2,829 GBP
Jared£2,918 GBP

7 data points across 4 retailers

4 retailers£2,674 GBP to £2,918 GBP

B
Cheapest Retailer
-
£2,674 GBP
$3,583 USD
B
Retailer 2
-
£2,829 GBP
$3,790 USD
View
B
Retailer 3
-
£2,829 GBP
$3,790 USD
View
Most Expensive
B
Jared
111862901 · Oct 30
£2,918 GBP
$3,910 USD
View
3 more retailers have this diamond
Prices start from £2,674 GBPSave up to £244 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
£2,674 GBP