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Cushion|Natural|GIA

0.51ct D SI1 Cushion Natural Diamond

ID • D/SI1 • GIA 6302501392

Certificate GIA 6302501392

Diamond specifications and retailer prices

From £811 GBP
As of November 5, 2026
Save £879 GBP (52%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £1,690 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter 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 6302501392. Listed at 8 retailers as of November 4, 2026, with prices from £811 to £1,690, a £879 spread on the same certified stone. MOH London lists it at £1,690. 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

0.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6302501392
Dimensions4.65 × 4.43 × 3.01 mm
L/W Ratio1.05
Top View
4.65 mm4.43 mm0.51 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6302501392
Side View
Table 64.0%CrownGirdle: THN-VTKPavilionCulet: NoneDepth 67.8%

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 5
Current: £1,690 GBP|Low: £356 GBP|High: £1,715 GBP|Avg: £1,075 GBP|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 6, 2026
Retailer 4£356 GBP
Retailer 3£1,056 GBP
Retailer 2£1,208 GBP
MOH London£1,690 GBP

41 data points across 4 retailers

8 retailers£811 GBP to £1,690 GBP

B+
Cheapest Retailer
-
£811 GBP
B
Retailer 2
-
£1,046 GBP
View
B
Retailer 3
-
£1,046 GBP
View
B
Retailer 4
-
£1,056 GBP
View
B
Retailer 5
-
£1,083 GBP
View
B
Retailer 6
-
£1,208 GBP
View
B
Retailer 7
-
£1,521 GBP
View
Most Expensive
B
MOH London
28F4671AA · Nov 4
£1,690 GBP
View
7 more retailers have this diamond
Prices start from £811 GBPSave up to £879 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+
0.51ct Cushion
£811 GBP