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Marquise|Natural|IGI

0.51ct K SI2 Marquise Natural Diamond

GD • K/SI2 • IGI 201623068

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 201623068

Diamond specifications and retailer prices

From $880 USD
As of November 6, 2026
Save $471 USD (35%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $1,351 USD at MOH London · As of November 4, 2026
View at MOH London

About this 0.51ct natural marquise diamond

This 0.51ct natural marquise sits in the half to three-quarter carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a standard cut grade and certified by IGI 201623068. Listed at 2 retailers as of November 4, 2026, with prices from $880 to $1,351, a $471 spread on the same certified stone. MOH London lists it at $1,351. 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
Good
Cut

Specifications

CutGood
PolishGood
SymmetryGood
FluorescenceFaint
Crown angle30.7°
Pavilion angle42.2°
OriginNatural
Grading LabIGI
CertificateIGI 201623068
Dimensions6.81 × 4.24 × 2.91 mm
L/W Ratio1.61
Girdle conditionFaceted
Culet sizeMedium
Top View
6.81 mm4.24 mm0.51 ctK / SI2
OriginNatural
CutGood
PolishGood
SymmetryGood
FluorescenceFaint
CertificateIGI 201623068
Side View
Table 55.0%Crown 30.7°Girdle: THK-VTKPavilion 42.2°Culet: MediumDepth 68.6%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 6
Current: $1,351 USD|Low: $752 USD|High: $1,369 USD|Avg: $997 USD|-0.4%
MOH London
Retailer 2
Retailer 3
November 6, 2026
Retailer 3$752 USD
Retailer 2$880 USD
MOH London$1,351 USD

21 data points across 3 retailers

2 retailers$880 USD to $1,351 USD

C
Cheapest Retailer
-
$880 USD
Most Expensive
C
MOH London
5237B8E52 · Nov 4
$1,351 USD
£1,064 GBP
View
1 more retailer has this diamond
Prices start from $880 USDSave up to $471 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.

C
0.51ct Marquise
$880 USD