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Cushion|Natural|GIA

1.51ct K SI2 Cushion Natural Diamond

EX • K/SI2 • GIA 5543768687

Certificate GIA 5543768687

Diamond specifications and retailer prices

From £2,739 GBP
As of November 6, 2026
Save £2,453 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,192 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5543768687. Listed at 8 retailers as of November 4, 2026, with prices from £2,739 to £5,192, a £2,453 spread on the same certified stone. MOH London lists it at £5,192. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle37°
OriginNatural
Grading LabGIA
CertificateGIA 5543768687
Dimensions7.91 × 6.00 × 4.06 mm
L/W Ratio1.32
Top View
7.91 mm6.00 mm1.51 ctK / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5543768687
Side View
Table 62.0%Crown 33.3°Girdle: STK-VTKPavilion 37°Culet: NoneDepth 67.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £5,192 GBP|Low: £2,739 GBP|High: £5,658 GBP|Avg: £3,584 GBP|-8.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 7£2,739 GBP
Retailer 8£2,854 GBP
Retailer 2£3,101 GBP
Retailer 5£3,112 GBP
Retailer 3£3,154 GBP
Retailer 4£3,223 GBP
Retailer 6£3,316 GBP
MOH London£5,192 GBP

44 data points across 8 retailers

8 retailers£2,739 GBP to £5,192 GBP

B+
Cheapest Retailer
-
£2,739 GBP
B+
Retailer 2
-
£2,854 GBP
View
B+
Retailer 3
-
£3,101 GBP
View
Retailer 4
-
£3,112 GBP
View
Price last confirmed 8 days ago
B+
Retailer 5
-
£3,154 GBP
View
B+
Retailer 6
-
£3,223 GBP
View
B
Retailer 7
-
£3,316 GBP
View
Most Expensive
B
MOH London
59BF3CB5C · Nov 4
£5,192 GBP
View
7 more retailers have this diamond
Prices start from £2,739 GBPSave up to £2,453 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
£2,739 GBP