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Cushion|Natural|GIA

1.51ct M SI1 Cushion Natural Diamond

EX • M/SI1 • GIA 6565590044

Certificate GIA 6565590044

Diamond specifications and retailer prices

From £1,042 GBP
As of November 6, 2026
Save £936 GBP (47%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £1,978 GBP at Diamonds Direct · As of November 6, 2026
View at Diamonds Direct

About this 1.51ct natural cushion diamond

This 1.51ct natural cushion sits in the one-and-a-half to two carat band, graded M 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 6565590044. Listed at 3 retailers as of November 6, 2026, with prices from £1,042 to £1,978, a £936 spread on the same certified stone. Diamonds Direct lists it at £1,978. 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
M
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565590044
Dimensions6.56 × 6.47 × 4.43 mm
L/W Ratio1.01
Key to symbols
Crystal, Cloud, Feather
Top View
6.56 mm6.47 mm1.51 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6565590044
Side View
Table 62.0%CrownGirdle: MED-VTKPavilionCuletDepth 68.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £1,978 GBP|Low: £1,033 GBP|High: £1,978 GBP|Avg: £1,447 GBP
Diamonds Direct
Retailer 2
Retailer 3
November 6, 2026
Retailer 3£1,042 GBP
Retailer 2£1,412 GBP
Diamonds Direct£1,978 GBP

11 data points across 3 retailers

3 retailers£1,042 GBP to £1,978 GBP

A
Cheapest Retailer
-
£1,042 GBP
B+
Retailer 2
-
£1,412 GBP
View
Most Expensive
B+
Diamonds Direct
1150004 · Nov 6
£1,978 GBP
$2,648 USD
View
2 more retailers have this diamond
Prices start from £1,042 GBPSave up to £936 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
£1,042 GBP