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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 £2,429 GBP
SGD 4,398 SGD
As of October 31, 2026
Save £1,982 GBP (45%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £4,411 GBP 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 £2,429 to £4,411, a £1,982 spread on the same certified stone. Wholesale Diamonds Direct lists it at £4,411. 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

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: £3,184 GBP|Low: £2,109 GBP|High: £4,944 GBP|Avg: £3,232 GBP|-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£2,109 GBP
Retailer 4£2,429 GBP
Retailer 3£2,548 GBP
Retailer 2£2,571 GBP
Retailer 5£3,086 GBP
Retailer 1£3,184 GBP
Retailer 8£3,279 GBP
Retailer 6£4,106 GBP
Wholesale Diamonds Direct£4,411 GBP

28 data points across 9 retailers

7 retailers£2,429 GBP to £4,411 GBP

A
Cheapest Retailer
-
£2,429 GBP
SGD 4,398 SGD
A
Retailer 2
-
£2,548 GBP
$3,414 USD
View
A
Retailer 3
-
£2,571 GBP
$3,445 USD
View
A
Retailer 4
-
£3,086 GBP
$4,136 USD
View
A
Retailer 5
-
£3,184 GBP
€4,063 EUR
View
A
Retailer 6
-
£3,279 GBP
$4,393 USD
View
Most Expensive
A
Wholesale Diamonds Direct
611240087 · Oct 27
£4,411 GBP
$5,910 USD
View
6 more retailers have this diamond
Prices start from £2,429 GBPSave up to £1,982 GBP

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
£2,429 GBP