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Cushion|Natural|GIA

0.51ct H SI2 Cushion Natural Diamond

GD • H/SI2 • GIA 6495045073

Certificate GIA 6495045073

Diamond specifications and retailer prices

From £428 GBP
$574 USD
As of November 2, 2026
Save £645 GBP (60%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,073 GBP at MOH London · As of November 1, 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6495045073. Listed at 9 retailers as of November 1, 2026, with prices from £428 to £1,073, a £645 spread on the same certified stone. MOH London lists it at £1,073. 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
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6495045073
Dimensions4.73 × 4.48 × 3.00 mm
L/W Ratio1.06
Top View
4.73 mm4.48 mm0.51 ctH / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6495045073
Side View
Table 59.0%CrownGirdle: ThickPavilionCulet: NoneDepth 66.8%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £1,073 GBP|Low: £428 GBP|High: £1,086 GBP|Avg: £597 GBP|-0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 7£428 GBP
Retailer 8£449 GBP
Retailer 6£501 GBP
Retailer 9£519 GBP
Retailer 10£522 GBP
Retailer 3£553 GBP
Retailer 11£563 GBP
Retailer 2£572 GBP
Retailer 5£582 GBP
Retailer 4£684 GBP
MOH London£1,073 GBP

40 data points across 11 retailers

9 retailers£428 GBP to £1,073 GBP

B+
Cheapest Retailer
-
£428 GBP
$574 USD
Final sale: no returns
B+
Retailer 2
-
£449 GBP
HK$4,700 HKD
View
B
Retailer 3
-
£501 GBP
$671 USD
View
B
Retailer 4
-
£522 GBP
$700 USD
View
B
Retailer 5
-
£563 GBP
$755 USD
View
B
Retailer 6
-
£572 GBP
View
B
Retailer 7
-
£582 GBP
View
B
Retailer 8
-
£684 GBP
€873 EUR
View
Most Expensive
C
MOH London
0582E195F · Nov 1
£1,073 GBP
View
8 more retailers have this diamond
Prices start from £428 GBPSave up to £645 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
£428 GBP