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Cushion|Natural|GIA

1.20ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 2151597618

Certificate GIA 2151597618

Diamond specifications and retailer prices

From £1,423 GBP
As of November 1, 2026
Save £814 GBP (36%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,237 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 1.2ct natural cushion diamond

This 1.2ct natural cushion sits in the classic one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 2151597618. Listed at 7 retailers as of November 1, 2026, with prices from £1,423 to £2,237, a £814 spread on the same certified stone. 77 Diamonds lists it at £2,237. 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

1.20
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishGood
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2151597618
Dimensions6.41 × 5.37 × 3.80 mm
L/W Ratio1.19
Top View
6.41 mm5.37 mm1.20 ctK / SI1
OriginNatural
CutVery Good
PolishGood
SymmetryExcellent
FluorescenceNone
CertificateGIA 2151597618
Side View
Table 60.0%CrownGirdle: ThickPavilionCulet: NoneDepth 70.8%

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: £2,237 GBP|Low: £1,423 GBP|High: £2,276 GBP|Avg: £1,728 GBP|+0.8%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 2£1,423 GBP
Retailer 4£1,460 GBP
Retailer 3£1,769 GBP
77 Diamonds£2,237 GBP

37 data points across 4 retailers

7 retailers£1,423 GBP to £2,237 GBP

B+
Cheapest Retailer
-
£1,423 GBP
B+
Retailer 2
-
£1,452 GBP
View
B+
Retailer 3
-
£1,460 GBP
View
B+
Retailer 4
-
£1,538 GBP
View
B
Retailer 5
-
£1,606 GBP
View
B
Retailer 6
-
£1,769 GBP
View
Most Expensive
B
77 Diamonds
CUSZ2DHKCKUQ · Nov 6
£2,237 GBP
View
6 more retailers have this diamond
Prices start from £1,423 GBPSave up to £814 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+
1.20ct Cushion
£1,423 GBP