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Cushion|Natural|GIA

1.31ct K SI1 Cushion Natural Diamond

VG • K/SI1 • GIA 1395417930

Certificate GIA 1395417930

Diamond specifications and retailer prices

From £1,951 GBP
As of November 4, 2026
Save £2,290 GBP (54%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,240 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.31ct natural cushion diamond

This 1.31ct natural cushion sits in the one-and-a-quarter to one-and-a-half 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 1395417930. Listed at 15 retailers as of November 4, 2026, with prices from £1,951 to £4,240, a £2,290 spread on the same certified stone. MOH London lists it at £4,240. 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

1.31
Carat
K
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishVery Good
SymmetryGood
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1395417930
Dimensions6.50 × 6.13 × 4.21 mm
L/W Ratio1.06
Culet sizeNone
Top View
6.50 mm6.13 mm1.31 ctK / SI1
OriginNatural
CutVery Good
PolishVery Good
SymmetryGood
FluorescenceNone
CertificateGIA 1395417930
Side View
Table 67.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 68.6%

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 4
Current: £4,240 GBP|Low: £1,994 GBP|High: £4,303 GBP|Avg: £2,628 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£1,994 GBP
Retailer 5£2,006 GBP
Retailer 6£2,062 GBP
Retailer 9£2,303 GBP
Retailer 7£2,471 GBP
Retailer 8£2,480 GBP
Retailer 4£2,632 GBP
Retailer 2£2,790 GBP
Retailer 3£3,103 GBP
MOH London£4,240 GBP

44 data points across 10 retailers

15 retailers£1,951 GBP to £4,240 GBP

B+
Cheapest Retailer
-
£1,951 GBP
B+
Retailer 2
-
£1,994 GBP
View
B+
Retailer 3
-
£2,006 GBP
View
B+
Retailer 4
-
£2,037 GBP
View
B+
Retailer 5
-
£2,062 GBP
View
B
Retailer 6
-
£2,241 GBP
View
Retailer 7
-
£2,303 GBP
View
Price last confirmed 9 days ago
B
Retailer 8
-
£2,471 GBP
View
B
Retailer 9
-
£2,480 GBP
View
B
Retailer 10
-
£2,501 GBP
View
B
Retailer 11
-
£2,632 GBP
View
B
Retailer 12
-
£2,790 GBP
View
Retailer 13
-
£2,881 GBP
View
Price last confirmed 15 days ago
B
Retailer 14
-
£3,103 GBP
View
Most Expensive
C
MOH London
ABE43FA0F · Nov 4
£4,240 GBP
View
14 more retailers have this diamond
Prices start from £1,951 GBPSave up to £2,290 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+
1.31ct Cushion
£1,951 GBP