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Cushion|Natural|GIA

1.20ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 6551490092

Certificate GIA 6551490092

Diamond specifications and retailer prices

From £1,836 GBP
As of November 6, 2026
Save £2,244 GBP (55%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £4,080 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6551490092. Listed at 16 retailers as of November 2, 2026, with prices from £1,836 to £4,080, a £2,244 spread on the same certified stone. MOH London lists it at £4,080. 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
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 6551490092
Dimensions7.11 × 5.31 × 3.59 mm
L/W Ratio1.34
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle
Top View
7.11 mm5.31 mm1.20 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 6551490092
Side View
Table 68.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.7%

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: £4,080 GBP|Low: £1,826 GBP|High: £4,257 GBP|Avg: £2,631 GBP|-3.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 10£1,836 GBP
Retailer 2£1,921 GBP
Retailer 3£2,199 GBP
Retailer 9£2,211 GBP
Retailer 11£2,252 GBP
Retailer 7£2,510 GBP
Retailer 6£2,557 GBP
Retailer 12£2,615 GBP
Retailer 4£2,687 GBP
Retailer 5£2,841 GBP
Retailer 8£2,978 GBP
MOH London£4,080 GBP

31 data points across 12 retailers

16 retailers£1,836 GBP to £4,080 GBP

A
Cheapest Retailer
-
£1,836 GBP
A
Retailer 2
-
£1,921 GBP
View
B+
Retailer 3
-
£2,199 GBP
View
B+
Retailer 4
-
£2,211 GBP
View
B+
Retailer 5
-
£2,252 GBP
View
Final sale: no returns
B+
Retailer 6
-
£2,327 GBP
View
B+
Retailer 7
-
£2,327 GBP
View
B+
Retailer 8
-
£2,485 GBP
View
B+
Retailer 9
-
£2,510 GBP
View
Retailer 10
-
£2,516 GBP
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£2,557 GBP
View
B+
Retailer 12
-
£2,615 GBP
View
Retailer 13
-
£2,687 GBP
View
Price last confirmed 31 days ago
B+
Retailer 14
-
£2,841 GBP
View
B+
Retailer 15
-
£2,978 GBP
View
Most Expensive
B
MOH London
DDFA2EE84 · Nov 2
£4,080 GBP
View
15 more retailers have this diamond
Prices start from £1,836 GBPSave up to £2,244 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.

A
1.20ct Cushion
£1,836 GBP