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Cushion · Old Mine|Natural|GIA

0.51ct I SI1 Cushion Natural Diamond

I/SI1 • GIA 6565214855

Certificate GIA 6565214855

Diamond specifications and retailer prices

From €481 EUR
$540 USD
As of November 2, 2026
Save €929 EUR (66%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €1,845 EUR at MOH London · As of November 2, 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 I colour (near-colourless) and SI1 clarity (slightly-included) and certified by GIA 6565214855. Listed at 4 retailers as of November 2, 2026, with a 193% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Color
SI1
Clarity
-
Cut

Specifications

Cut
PolishExcellent
SymmetryFair
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6565214855
Dimensions4.74 × 4.62 × 3.00 mm
L/W Ratio1.03
Culet sizeVery Large
Top View
4.74 mm4.62 mm0.51 ctI / SI1
OriginNatural
PolishExcellent
SymmetryFair
FluorescenceNone
CertificateGIA 6565214855
Side View
Table 55.0%CrownGirdle: MED-VTKPavilionCulet: Very LargeDepth 64.8%

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: €1,845 EUR|Low: €481 EUR|High: €1,845 EUR|Avg: €1,099 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4€481 EUR
Retailer 3€1,123 EUR
Retailer 2€1,411 EUR
MOH London€1,845 EUR

3 data points across 4 retailers

4 retailers€481 EUR to €1,411 EUR

B+
Cheapest Retailer
-
€481 EUR
$540 USD
C
Retailer 2
-
€1,123 EUR
$1,260 USD
View
C
Retailer 3
-
€1,411 EUR
View
Most Expensive
MOH London
240468541 · Nov 2
€1,845 EUR
£1,629 GBP
View
Price under review
3 more retailers have this diamond
Prices start from €481 EURSave up to €929 EUR

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
€481 EUR