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Cushion|Natural|GIA

1.51ct K SI1 Cushion Natural Diamond

EX • K/SI1 • GIA 1343477968

Certificate GIA 1343477968

Diamond specifications and retailer prices

From £3,520 GBP
As of November 6, 2026
Save £3,351 GBP (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £6,870 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1343477968. Listed at 15 retailers as of November 4, 2026, with prices from £3,520 to £6,870, a £3,351 spread on the same certified stone. MOH London lists it at £6,870. 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

1.51
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1343477968
Dimensions6.60 × 6.58 × 4.43 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.60 mm6.58 mm1.51 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1343477968
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 67.3%

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 6
Current: £6,870 GBP|Low: £3,520 GBP|High: £6,972 GBP|Avg: £4,627 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 8£3,520 GBP
Retailer 5£3,586 GBP
Retailer 9£3,960 GBP
Retailer 6£4,236 GBP
Retailer 7£4,430 GBP
Retailer 3£4,442 GBP
Retailer 2£4,810 GBP
Retailer 4£5,705 GBP
MOH London£6,870 GBP

44 data points across 9 retailers

15 retailers£3,520 GBP to £6,870 GBP

B
Cheapest Retailer
-
£3,520 GBP
Retailer 2
-
£3,586 GBP
View
Price last confirmed 10 days ago
B+
Retailer 3
-
£3,653 GBP
View
B+
Retailer 4
-
£3,694 GBP
View
B+
Retailer 5
-
£3,742 GBP
View
B
Retailer 6
-
£3,943 GBP
View
B
Retailer 7
-
£3,960 GBP
View
Retailer 8
-
£4,236 GBP
View
Price last confirmed 9 days ago
B
Retailer 9
-
£4,430 GBP
View
B
Retailer 10
-
£4,442 GBP
View
B
Retailer 11
-
£4,465 GBP
View
B
Retailer 12
-
£4,810 GBP
View
Retailer 13
-
£5,157 GBP
View
Price last confirmed 15 days ago
B
Retailer 14
-
£5,705 GBP
View
Most Expensive
B
MOH London
5FC1F0D5D · Nov 4
£6,870 GBP
View
14 more retailers have this diamond
Prices start from £3,520 GBPSave up to £3,351 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+
1.51ct Cushion
£3,520 GBP