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Cushion|Natural|GIA

0.51ct H SI1 Cushion Natural Diamond

GD • H/SI1 • GIA 2537508439

Certificate GIA 2537508439

Diamond specifications and retailer prices

From £267 GBP
As of November 6, 2026
Save £76 GBP (22%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £343 GBP at 77 Diamonds · As of November 6, 2026
View at 77 Diamonds

About this 0.51ct natural cushion diamond

This 0.51ct natural cushion sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2537508439. Listed at 4 retailers as of November 6, 2026, with prices from £267 to £343, a £76 spread on the same certified stone. 77 Diamonds lists it at £343. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.51
Carat
H
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2537508439
Dimensions4.63 × 4.42 × 2.95 mm
L/W Ratio1.05
Top View
4.63 mm4.42 mm0.51 ctH / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2537508439
Side View
Table 64.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £343 GBP|Low: £221 GBP|High: £366 GBP|Avg: £299 GBP|-4.4%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2£253 GBP
Retailer 5£267 GBP
Retailer 3£300 GBP
Retailer 4£326 GBP
77 Diamonds£343 GBP

40 data points across 5 retailers

4 retailers£267 GBP to £343 GBP

A
Cheapest Retailer
-
£267 GBP
Retailer 2
-
£300 GBP
View
Price last confirmed 11 days ago
Retailer 3
-
£326 GBP
View
Price last confirmed 10 days ago
Most Expensive
B+
77 Diamonds
CUSCPFY7KRDR3 · Nov 6
£343 GBP
View
3 more retailers have this diamond
Prices start from £267 GBPSave up to £76 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
0.51ct Cushion
£267 GBP