CaratHunter
Plans
Cushion|Natural|GIA

0.51ct D SI2 Cushion Natural Diamond

GD • D/SI2 • GIA 6565226153

Certificate GIA 6565226153

Diamond specifications and retailer prices

From £337 GBP
$452 USD
As of October 31, 2026
Save £82 GBP (20%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £419 GBP at 77 Diamonds · As of October 31, 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 D colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 6565226153. Listed at 4 retailers as of October 31, 2026, with prices from £337 to £419, a £82 spread on the same certified stone. 77 Diamonds lists it at £419. 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
D
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6565226153
Dimensions4.53 × 4.43 × 3.01 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal
Top View
4.53 mm4.43 mm0.51 ctD / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 6565226153
Side View
Table 64.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 68.0%

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: Oct 31
Current: £419 GBP|Low: £337 GBP|High: £423 GBP|Avg: £373 GBP|+4.9%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
October 31, 2026
Retailer 2£337 GBP
Retailer 4£343 GBP
Retailer 3£367 GBP
77 Diamonds£419 GBP

38 data points across 4 retailers

4 retailers£337 GBP to £419 GBP

A
Cheapest Retailer
-
£337 GBP
$452 USD
Final sale: no returns
Retailer 2
-
£343 GBP
$460 USD
View
Price last confirmed 10 days ago
B+
Retailer 3
-
£367 GBP
SGD 664 SGD
View
Most Expensive
B+
77 Diamonds
CUSCP6MB47FXP · Oct 31
£419 GBP
View
3 more retailers have this diamond
Prices start from £337 GBPSave up to £82 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
£337 GBP