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Marquise|Natural|IGI

1.51ct I SI2 Marquise Natural Diamond

EX • I/SI2 • IGI 803677043

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803677043

Diamond specifications and retailer prices

From $1,843 USD
SGD 2,490 SGD
As of October 31, 2026
Save $1,913 USD (51%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $3,755 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 I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 803677043. Listed at 6 retailers as of October 27, 2026, with prices from $1,843 to $3,755, a $1,913 spread on the same certified stone. Wholesale Diamonds Direct lists it at $3,755. 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
I
Color
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.7°
Pavilion angle41.7°
OriginNatural
Grading LabIGI
CertificateIGI 803677043
Dimensions11.59 × 5.90 × 3.81 mm
L/W Ratio1.96
Girdle conditionFaceted
Top View
11.59 mm5.90 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 803677043
Side View
Table 59.0%Crown 38.7°Girdle: THN-STKPavilion 41.7°Culet: NoneDepth 64.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $2,180 USD|Low: $1,825 USD|High: $4,360 USD|Avg: $2,739 USD|-15.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
October 28, 2026
Retailer 7$1,825 USD
Retailer 3$1,843 USD
Retailer 2$2,173 USD
Retailer 1$2,180 USD
Retailer 4$2,736 USD
Retailer 6$2,827 USD
Retailer 5$3,566 USD
Wholesale Diamonds Direct$3,755 USD

29 data points across 8 retailers

6 retailers$1,843 USD to $3,755 USD

A
Cheapest Retailer
-
$1,843 USD
SGD 2,490 SGD
A
Retailer 2
-
$2,173 USD
View
A
Retailer 3
-
$2,180 USD
View
A
Retailer 4
-
$2,736 USD
View
B+
Retailer 5
-
$2,827 USD
View
Most Expensive
A
Wholesale Diamonds Direct
262936345 · Oct 27
$3,755 USD
View
5 more retailers have this diamond
Prices start from $1,843 USDSave up to $1,913 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
$1,843 USD