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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 $691 SGD
$540 USD
As of November 2, 2026
Save $1,333 SGD (66%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $2,646 SGD 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
Colour
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: $2,646 SGD|Low: $691 SGD|High: $2,646 SGD|Avg: $1,576 SGD
MOH London
Retailer 2
Retailer 3
Retailer 4
November 2, 2026
Retailer 4$691 SGD
Retailer 3$1,611 SGD
Retailer 2$2,024 SGD
MOH London$2,646 SGD

3 data points across 4 retailers

4 retailers$691 SGD to $2,024 SGD

B+
Cheapest Retailer
-
$691 SGD
$540 USD
C
Retailer 2
-
$1,611 SGD
$1,260 USD
View
C
Retailer 3
-
$2,024 SGD
€1,507 EUR
View
Most Expensive
MOH London
240468541 · Nov 2
$2,646 SGD
£1,629 GBP
View
Price under review
3 more retailers have this diamond
Prices start from $691 SGDSave up to $1,333 SGD

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
$691 SGD