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Marquise|Natural|IGI

1.31ct J SI1 Marquise Natural Diamond

EX • J/SI1 • IGI 731572166

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 731572166

Diamond specifications and retailer prices

From $2,680 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: $2,680 USD at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1.31ct natural marquise diamond

This 1.31ct natural marquise sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 731572166. Listed at a single retailer as of November 2, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.31
Carat
J
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36.5°
Pavilion angle40°
OriginNatural
Grading LabIGI
CertificateIGI 731572166
Dimensions11.38 × 5.71 × 3.57 mm
L/W Ratio1.99
Girdle conditionFaceted
Culet sizePointed
Top View
11.38 mm5.71 mm1.31 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateIGI 731572166
Side View
Table 59.0%Crown 36.5°Girdle: MED-STKPavilion 40°Culet: NoneDepth 62.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 2
Current: $2,680 USD|Low: $2,680 USD|High: $2,680 USD|Avg: $2,680 USD
December 30, 2025
Brilliant Earth$2,680 USD

4 data points across 1 retailer

1 retailer

B+
Brilliant Earth
16445681A · Nov 2
$2,680 USD
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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+
1.31ct Marquise
$2,680 USD