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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 $2,623 AUD
SGD 2,490 SGD
As of October 31, 2026
Save $2,723 AUD (51%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $5,346 AUD 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 $2,623 to $5,346, a $2,723 spread on the same certified stone. Wholesale Diamonds Direct lists it at $5,346. 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
Colour
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: $3,103 AUD|Low: $2,598 AUD|High: $6,206 AUD|Avg: $3,900 AUD|-15.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
October 28, 2026
Retailer 7$2,598 AUD
Retailer 3$2,623 AUD
Retailer 2$3,093 AUD
Retailer 1$3,103 AUD
Retailer 4$3,895 AUD
Retailer 6$4,025 AUD
Retailer 5$5,077 AUD
Wholesale Diamonds Direct$5,346 AUD

29 data points across 8 retailers

6 retailers$2,623 AUD to $5,346 AUD

A
Cheapest Retailer
-
$2,623 AUD
SGD 2,490 SGD
A
Retailer 2
-
$3,093 AUD
$2,173 USD
View
A
Retailer 3
-
$3,103 AUD
$2,180 USD
View
A
Retailer 4
-
$3,895 AUD
$2,736 USD
View
B+
Retailer 5
-
$4,025 AUD
$2,827 USD
View
Most Expensive
A
Wholesale Diamonds Direct
262936345 · Oct 27
$5,346 AUD
$3,755 USD
View
5 more retailers have this diamond
Prices start from $2,623 AUDSave up to $2,723 AUD

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
$2,623 AUD