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Marquise|Natural|IGI

1.21ct F SI2 Marquise Natural Diamond

EX • F/SI2 • IGI 813642096

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 813642096

Diamond specifications and retailer prices

From £1,306 GBP
As of November 5, 2026
Save £856 GBP (40%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £2,554 GBP at Wholesale Diamonds Direct · As of October 23, 2026
View at Wholesale Diamonds Direct

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 813642096. Listed at 7 retailers as of October 31, 2026, with a 66% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
F
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle37.9°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 813642096
Dimensions10.64 × 5.54 × 3.53 mm
L/W Ratio1.92
Girdle conditionFaceted
Top View
10.64 mm5.54 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateIGI 813642096
Side View
Table 58.0%Crown 37.9°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 63.7%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 5
Current: £1,306 GBP|Low: £1,299 GBP|High: £2,811 GBP|Avg: £2,027 GBP|-8.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Wholesale Diamonds Direct
November 5, 2026
Retailer 1£1,306 GBP
Retailer 4£1,527 GBP
Retailer 3£1,550 GBP
Retailer 5£1,942 GBP
Retailer 7£2,140 GBP
Retailer 2£2,162 GBP
Wholesale Diamonds Direct£2,554 GBP
Retailer 6£2,609 GBP

29 data points across 8 retailers

7 retailers£1,306 GBP to £2,162 GBP

A
Cheapest Retailer
-
£1,306 GBP
Retailer 2
-
£1,527 GBP
View
Price last confirmed 8 days ago
Retailer 3
-
£1,550 GBP
View
Price last confirmed 10 days ago
A
Retailer 4
-
£1,942 GBP
View
B+
Retailer 5
-
£2,140 GBP
View
B+
Retailer 6
-
£2,162 GBP
View
Most Expensive
Wholesale Diamonds Direct
553662809 · Oct 23
£2,554 GBP
$3,418 USD
View
Price last confirmed 14 days ago
6 more retailers have this diamond
Prices start from £1,306 GBPSave up to £856 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
1.21ct Marquise
£1,306 GBP