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Marquise|Natural|GIA

1.21ct M SI1 Marquise Natural Diamond

EX • M/SI1 • GIA 1242003834

Certificate GIA 1242003834

Diamond specifications and retailer prices

From £1,249 GBP
As of November 4, 2026
Save £741 GBP (37%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £1,990 GBP at Wholesale Diamonds Direct · As of November 3, 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 M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1242003834. Listed at 6 retailers as of November 3, 2026, with prices from £1,249 to £1,990, a £741 spread on the same certified stone. Wholesale Diamonds Direct lists it at £1,990. 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
M
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle39.41°
Pavilion angle38.47°
OriginNatural
Grading LabGIA
CertificateGIA 1242003834
Dimensions11.38 × 5.44 × 3.29 mm
L/W Ratio2.09
Culet sizeNone
Top View
11.38 mm5.44 mm1.21 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1242003834
Side View
Table 59.0%Crown 39.41°Girdle: STK-THKPavilion 38.47°Culet: NoneDepth 60.4%

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: Nov 4
Current: £1,721 GBP|Low: £1,003 GBP|High: £2,259 GBP|Avg: £1,665 GBP|-15.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Wholesale Diamonds Direct
November 3, 2026
Retailer 5£1,003 GBP
Retailer 4£1,249 GBP
Retailer 2£1,537 GBP
Retailer 3£1,611 GBP
Retailer 1£1,721 GBP
Wholesale Diamonds Direct£1,990 GBP
Retailer 6£2,008 GBP

35 data points across 7 retailers

6 retailers£1,249 GBP to £1,990 GBP

A
Cheapest Retailer
-
£1,249 GBP
B+
Retailer 2
-
£1,537 GBP
View
B+
Retailer 3
-
£1,611 GBP
View
B
Retailer 4
-
£1,641 GBP
View
B
Retailer 5
-
£1,721 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
539238965 · Nov 3
£1,990 GBP
$2,678 USD
View
5 more retailers have this diamond
Prices start from £1,249 GBPSave up to £741 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
£1,249 GBP