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Cushion|Natural|IGI

0.51ct K SI1 Cushion Natural Diamond

VG • K/SI1 • IGI 741597205

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

Certificate IGI 741597205

Diamond specifications and retailer prices

From $258 USD
As of November 6, 2026
Save $566 USD (69%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $824 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 741597205. Listed at 6 retailers as of November 4, 2026, with prices from $258 to $824, a $566 spread on the same certified stone. MOH London lists it at $824. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle41.6°
Pavilion angle34.4°
OriginNatural
Grading LabIGI
CertificateIGI 741597205
Dimensions4.50 × 4.37 × 3.04 mm
L/W Ratio1.03
Girdle conditionFaceted
Culet sizePointed
Top View
4.50 mm4.37 mm0.51 ctK / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 741597205
Side View
Table 65.0%Crown 41.6°Girdle: MED-STKPavilion 34.4°Culet: NoneDepth 69.6%

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: $824 USD|Low: $258 USD|High: $855 USD|Avg: $538 USD|-3.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 2$258 USD
Retailer 4$475 USD
Retailer 6$487 USD
Retailer 5$554 USD
Retailer 3$655 USD
MOH London$824 USD

41 data points across 6 retailers

6 retailers$258 USD to $824 USD

A
Cheapest Retailer
-
$258 USD
B+
Retailer 2
-
$475 USD
View
B+
Retailer 3
-
$487 USD
View
B+
Retailer 4
-
$554 USD
View
B+
Retailer 5
-
$655 USD
View
Most Expensive
B
MOH London
B678EC5D3 · Nov 4
$824 USD
£649 GBP
View
5 more retailers have this diamond
Prices start from $258 USDSave up to $566 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
$258 USD