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Cushion|Natural|GIA

1.20ct H SI1 Cushion Natural Diamond

EX • H/SI1 • GIA 6237990521

Certificate GIA 6237990521

Diamond specifications and retailer prices

From £1,377 GBP
As of November 6, 2026
Save £1,943 GBP (59%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,320 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded H 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 6237990521. Listed at 10 retailers as of November 2, 2026, with prices from £1,377 to £3,320, a £1,943 spread on the same certified stone. MOH London lists it at £3,320. 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

1.20
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle37.15°
OriginNatural
Grading LabGIA
CertificateGIA 6237990521
Dimensions7.29 × 5.50 × 3.83 mm
L/W Ratio1.33
Key to symbols
Crystal, Cloud, Needle
Top View
7.29 mm5.50 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6237990521
Side View
Table 64.0%CrownGirdle: MED-THKPavilion 37.15°Culet: NoneDepth 69.6%

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 6
Current: £3,320 GBP|Low: £1,377 GBP|High: £3,525 GBP|Avg: £2,215 GBP|-5.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 6£1,377 GBP
Retailer 5£1,648 GBP
Retailer 8£1,749 GBP
Retailer 2£1,814 GBP
Retailer 4£1,913 GBP
Retailer 7£2,045 GBP
Retailer 3£2,332 GBP
Retailer 9£2,879 GBP
MOH London£3,320 GBP

32 data points across 9 retailers

10 retailers£1,377 GBP to £3,320 GBP

A
Cheapest Retailer
-
£1,377 GBP
Retailer 2
-
£1,648 GBP
View
Price last confirmed 3 days ago
B+
Retailer 3
-
£1,749 GBP
View
B+
Retailer 4
-
£1,814 GBP
View
B+
Retailer 5
-
£1,913 GBP
View
B+
Retailer 6
-
£2,045 GBP
View
B+
Retailer 7
-
£2,092 GBP
View
B+
Retailer 8
-
£2,332 GBP
View
B
Retailer 9
-
£2,879 GBP
View
Most Expensive
B
MOH London
7E12B0BD9 · Nov 2
£3,320 GBP
View
9 more retailers have this diamond
Prices start from £1,377 GBPSave up to £1,943 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
1.20ct Cushion
£1,377 GBP