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Marquise|Natural|GIA

1.21ct G SI1 Marquise Natural Diamond

EX • G/SI1 • GIA 5241043968

Certificate GIA 5241043968

Diamond specifications and retailer prices

From £3,233 GBP
As of November 6, 2026
Save £2,987 GBP (48%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £6,220 GBP at MOH London · As of November 4, 2026
View at MOH London

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241043968. Listed at 6 retailers as of November 4, 2026, with prices from £3,233 to £6,220, a £2,987 spread on the same certified stone. MOH London lists it at £6,220. 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
G
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryGood
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 5241043968
Dimensions9.95 × 5.76 × 3.62 mm
L/W Ratio1.73
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Needle, Feather, Natural
Top View
9.95 mm5.76 mm1.21 ctG / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryGood
FluorescenceFaint
CertificateGIA 5241043968
Side View
Table 53.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £6,220 GBP|Low: £3,153 GBP|High: £6,303 GBP|Avg: £4,504 GBP|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 4£3,153 GBP
Retailer 3£3,869 GBP
Retailer 5£4,321 GBP
Retailer 2£4,405 GBP
MOH London£6,220 GBP

34 data points across 5 retailers

6 retailers£3,233 GBP to £6,220 GBP

Retailer 1
-
£3,153 GBP
Price last confirmed 10 days ago
B+
Retailer 2
-
£3,233 GBP
View
B
Retailer 3
-
£3,869 GBP
View
Retailer 4
-
£4,321 GBP
View
Price last confirmed 25 days ago
B
Retailer 5
-
£4,405 GBP
View
Most Expensive
B
MOH London
2F5F63AFF · Nov 4
£6,220 GBP
View
5 more retailers have this diamond
Prices start from £3,233 GBPSave up to £2,987 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.

B+
1.21ct Marquise
£3,233 GBP