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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 $4,644 AUD
SGD 4,398 SGD
As of October 31, 2026
Save $3,789 AUD (45%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $8,433 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 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 $4,644 to $8,433, a $3,789 spread on the same certified stone. Wholesale Diamonds Direct lists it at $8,433. 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
Colour
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

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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: $6,087 AUD|Low: $4,031 AUD|High: $9,453 AUD|Avg: $6,178 AUD|-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$4,031 AUD
Retailer 4$4,644 AUD
Retailer 3$4,871 AUD
Retailer 2$4,916 AUD
Retailer 5$5,901 AUD
Retailer 1$6,087 AUD
Retailer 8$6,268 AUD
Retailer 6$7,851 AUD
Wholesale Diamonds Direct$8,433 AUD

28 data points across 9 retailers

7 retailers$4,644 AUD to $8,433 AUD

A
Cheapest Retailer
-
$4,644 AUD
SGD 4,398 SGD
A
Retailer 2
-
$4,871 AUD
$3,414 USD
View
A
Retailer 3
-
$4,916 AUD
$3,445 USD
View
A
Retailer 4
-
$5,901 AUD
$4,136 USD
View
A
Retailer 5
-
$6,087 AUD
€4,063 EUR
View
A
Retailer 6
-
$6,268 AUD
$4,393 USD
View
Most Expensive
A
Wholesale Diamonds Direct
611240087 · Oct 27
$8,433 AUD
$5,910 USD
View
6 more retailers have this diamond
Prices start from $4,644 AUDSave up to $3,789 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
$4,644 AUD