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Marquise|Natural|GIA

1.21ct F SI2 Marquise Natural Diamond

EX • F/SI2 • GIA 2245000215

Certificate GIA 2245000215

Diamond specifications and retailer prices

From £2,836 GBP
As of November 4, 2026
Save £2,246 GBP (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £5,082 GBP at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

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 stated by the retailer rather than the lab and certified by GIA 2245000215. Listed at 13 retailers as of November 4, 2026, with prices from £2,836 to £5,082, a £2,246 spread on the same certified stone. Helzberg Diamonds lists it at £5,082. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.01°
Pavilion angle37.63°
OriginNatural
Grading LabGIA
CertificateGIA 2245000215
Dimensions10.59 × 5.59 × 3.39 mm
L/W Ratio1.89
Culet sizeNone
Top View
10.59 mm5.59 mm1.21 ctF / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2245000215
Side View
Table 58.0%Crown 40.01°Girdle: MED-THKPavilion 37.63°Culet: NoneDepth 60.7%

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: Nov 4
Current: £5,082 GBP|Low: £2,836 GBP|High: £5,292 GBP|Avg: £3,641 GBP|-4.0%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 8£2,836 GBP
Retailer 6£2,905 GBP
Retailer 4£2,906 GBP
Retailer 9£3,004 GBP
Retailer 12£3,096 GBP
Retailer 7£3,272 GBP
Retailer 10£3,586 GBP
Retailer 11£3,608 GBP
Retailer 5£3,646 GBP
Retailer 2£3,934 GBP
Retailer 3£5,057 GBP
Helzberg Diamonds£5,082 GBP

35 data points across 12 retailers

13 retailers£2,836 GBP to £5,082 GBP

A
Cheapest Retailer
-
£2,836 GBP
A
Retailer 2
-
£2,905 GBP
View
A
Retailer 3
-
£2,906 GBP
View
B+
Retailer 4
-
£3,004 GBP
View
B+
Retailer 5
-
£3,096 GBP
View
B+
Retailer 6
-
£3,272 GBP
View
B+
Retailer 7
-
£3,586 GBP
View
B+
Retailer 8
-
£3,608 GBP
View
B+
Retailer 9
-
£3,646 GBP
View
B+
Retailer 10
-
£3,783 GBP
View
B+
Retailer 11
-
£3,934 GBP
View
B
Retailer 12
-
£5,057 GBP
View
Most Expensive
B
Helzberg Diamonds
XZRIIKLGGGIHL · Nov 6
£5,082 GBP
$6,802 USD
View
12 more retailers have this diamond
Prices start from £2,836 GBPSave up to £2,246 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
£2,836 GBP