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Marquise|Natural|IGI

1.51ct G SI2 Marquise Natural Diamond

EX • G/SI2 • IGI 803677663

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803677663

Diamond specifications and retailer prices

From $3,255 USD
SGD 4,398 SGD
As of October 31, 2026
Save $2,656 USD (45%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $5,910 USD at Wholesale Diamonds Direct · As of October 27, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 803677663. Listed at 7 retailers as of October 27, 2026, with prices from $3,255 to $5,910, a $2,656 spread on the same certified stone. Wholesale Diamonds Direct lists it at $5,910. 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

1.51
Carat
G
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle41.6°
OriginNatural
Grading LabIGI
CertificateIGI 803677663
Dimensions11.89 × 5.93 × 3.70 mm
L/W Ratio2.01
Girdle conditionFaceted
Top View
11.89 mm5.93 mm1.51 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803677663
Side View
Table 58.0%Crown 34.8°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.4%

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: Oct 31
Current: $4,266 USD|Low: $2,825 USD|High: $6,625 USD|Avg: $4,330 USD|-10.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
October 28, 2026
Retailer 7$2,825 USD
Retailer 4$3,255 USD
Retailer 3$3,414 USD
Retailer 2$3,445 USD
Retailer 5$4,136 USD
Retailer 1$4,266 USD
Retailer 8$4,393 USD
Retailer 6$5,502 USD
Wholesale Diamonds Direct$5,910 USD

28 data points across 9 retailers

7 retailers$3,255 USD to $5,910 USD

A
Cheapest Retailer
-
$3,255 USD
SGD 4,398 SGD
A
Retailer 2
-
$3,414 USD
View
A
Retailer 3
-
$3,445 USD
View
A
Retailer 4
-
$4,136 USD
View
A
Retailer 5
-
$4,266 USD
€4,063 EUR
View
A
Retailer 6
-
$4,393 USD
View
Most Expensive
A
Wholesale Diamonds Direct
611240087 · Oct 27
$5,910 USD
View
6 more retailers have this diamond
Prices start from $3,255 USDSave up to $2,656 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
1.51ct Marquise
$3,255 USD