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Marquise|Natural|GIA

1.21ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 2557704668

Certificate GIA 2557704668

Diamond specifications and retailer prices

From £3,222 GBP
As of November 6, 2026
Save £2,997 GBP (48%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £6,220 GBP at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557704668. Listed at 8 retailers as of November 3, 2026, with prices from £3,222 to £6,220, a £2,997 spread on the same certified stone. NZ Jewellers 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
D
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40.83°
Pavilion angle41.22°
OriginNatural
Grading LabGIA
CertificateGIA 2557704668
Dimensions9.71 × 5.44 × 3.75 mm
L/W Ratio1.78
Girdle conditionVery Thick
Key to symbols
Crystal, Cloud, Feather, Needle, Natural
Top View
9.71 mm5.44 mm1.21 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2557704668
Side View
Table 57.0%Crown 40.83°Girdle: Very ThickPavilion 41.22°Culet: NoneDepth 68.9%

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 6
Current: £6,220 GBP|Low: £3,222 GBP|High: £6,495 GBP|Avg: £4,156 GBP|-4.2%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 4, 2026
Retailer 5£3,222 GBP
Retailer 4£3,482 GBP
Retailer 2£3,526 GBP
Retailer 6£3,526 GBP
Retailer 7£3,570 GBP
Retailer 8£3,570 GBP
Retailer 3£5,686 GBP
NZ Jewellers£6,220 GBP

23 data points across 8 retailers

8 retailers£3,222 GBP to £6,220 GBP

A
Cheapest Retailer
-
£3,222 GBP
B+
Retailer 2
-
£3,482 GBP
View
B+
Retailer 3
-
£3,526 GBP
View
B+
Retailer 4
-
£3,526 GBP
View
B+
Retailer 5
-
£3,570 GBP
View
B+
Retailer 6
-
£3,570 GBP
View
B
Retailer 7
-
£5,686 GBP
View
Most Expensive
B
NZ Jewellers
80b944d9-a944-45fd-a44e-75b4bba904f5 · Nov 3
£6,220 GBP
$8,325 USD
View
7 more retailers have this diamond
Prices start from £3,222 GBPSave up to £2,997 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
£3,222 GBP