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Cushion|Natural|IGI

0.51ct K SI2 Cushion Natural Diamond

VG • K/SI2 • IGI 749531710

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI 749531710

Diamond specifications and retailer prices

From $250 USD
As of November 6, 2026
Save $550 USD (69%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: $800 USD at MOH London · As of November 4, 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 749531710. Listed at 5 retailers as of November 4, 2026, with prices from $250 to $800, a $550 spread on the same certified stone. MOH London lists it at $800. 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
K
Color
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle39.3°
Pavilion angle38.5°
OriginNatural
Grading LabIGI
CertificateIGI 749531710
Dimensions4.46 × 4.35 × 3.22 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizeNone
Top View
4.46 mm4.35 mm0.51 ctK / SI2
OriginNatural
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI 749531710
Side View
Table 63.0%Crown 39.3°Girdle: THK-VTKPavilion 38.5°Culet: NoneDepth 74.0%

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: $800 USD|Low: $250 USD|High: $829 USD|Avg: $532 USD|-2.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 2$250 USD
Retailer 4$477 USD
Retailer 5$477 USD
Retailer 3$639 USD
MOH London$800 USD

44 data points across 5 retailers

5 retailers$250 USD to $800 USD

A
Cheapest Retailer
-
$250 USD
B+
Retailer 2
-
$477 USD
View
B+
Retailer 3
-
$477 USD
View
B
Retailer 4
-
$639 USD
View
Most Expensive
B
MOH London
C8F3922F8 · Nov 4
$800 USD
£630 GBP
View
4 more retailers have this diamond
Prices start from $250 USDSave up to $550 USD

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
$250 USD