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Cushion|Natural|GIA

1.51ct D SI1 Cushion Natural Diamond

EX • D/SI1 • GIA 6511643903

Certificate GIA 6511643903

Diamond specifications and retailer prices

From £3,321 GBP
As of November 6, 2026
Save £2,395 GBP (42%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,716 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 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 6511643903. Listed at 11 retailers as of November 4, 2026, with prices from £3,321 to £5,716, a £2,395 spread on the same certified stone. MOH London lists it at £5,716. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6511643903
Dimensions7.13 × 5.95 × 4.15 mm
L/W Ratio1.20
Top View
7.13 mm5.95 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6511643903
Side View
Table 69.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 69.8%

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: £5,716 GBP|Low: £3,321 GBP|High: £5,800 GBP|Avg: £4,013 GBP|-1.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9£3,321 GBP
Retailer 2£3,348 GBP
Retailer 8£3,433 GBP
Retailer 5£3,543 GBP
Retailer 11£3,598 GBP
Retailer 10£3,627 GBP
Retailer 3£3,711 GBP
Retailer 4£4,049 GBP
Retailer 6£4,390 GBP
Retailer 7£4,973 GBP
MOH London£5,716 GBP

33 data points across 11 retailers

11 retailers£3,321 GBP to £5,716 GBP

A
Cheapest Retailer
-
£3,321 GBP
Final sale: no returns
A
Retailer 2
-
£3,348 GBP
View
A
Retailer 3
-
£3,433 GBP
View
A
Retailer 4
-
£3,543 GBP
View
Retailer 5
-
£3,598 GBP
View
Price last confirmed 9 days ago
Retailer 6
-
£3,627 GBP
View
Price last confirmed 29 days ago
A
Retailer 7
-
£3,711 GBP
View
A
Retailer 8
-
£4,049 GBP
View
A
Retailer 9
-
£4,390 GBP
View
B+
Retailer 10
-
£4,973 GBP
View
Most Expensive
B+
MOH London
69AF21D71 · Nov 4
£5,716 GBP
View
10 more retailers have this diamond
Prices start from £3,321 GBPSave up to £2,395 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
1.51ct Cushion
£3,321 GBP