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Marquise|Natural|GIA

1.21ct J SI2 Marquise Natural Diamond

ID • J/SI2 • GIA 05

Certificate GIA 05

Diamond specifications and retailer prices

From £2,300 GBP
As of November 4, 2026
Save £2,914 GBP (56%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,215 GBP at NZ Jewellers · As of November 5, 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 J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA. Listed at 8 retailers as of November 4, 2026, with prices from £2,300 to £5,215, a £2,914 spread on the same certified stone. NZ Jewellers lists it at £5,215. 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
J
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 05
Dimensions10.32 × 5.53 × 3.51 mm
L/W Ratio1.87
Top View
10.32 mm5.53 mm1.21 ctJ / SI2
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 05
Side View
Table 62.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.5%

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 4
Current: £5,215 GBP|Low: £2,300 GBP|High: £5,393 GBP|Avg: £3,103 GBP|-3.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 5, 2026
Retailer 3£2,300 GBP
Retailer 8£2,384 GBP
Retailer 4£2,711 GBP
Retailer 7£2,805 GBP
Retailer 6£2,816 GBP
Retailer 5£2,866 GBP
Retailer 2£3,099 GBP
NZ Jewellers£5,215 GBP

10 data points across 8 retailers

8 retailers£2,300 GBP to £5,215 GBP

B+
Cheapest Retailer
-
£2,300 GBP
B
Retailer 2
-
£2,384 GBP
View
B
Retailer 3
-
£2,711 GBP
View
Retailer 4
-
£2,805 GBP
View
Price last confirmed 9 days ago
B
Retailer 5
-
£2,816 GBP
View
B
Retailer 6
-
£2,866 GBP
View
B
Retailer 7
-
£3,099 GBP
View
Most Expensive
B
NZ Jewellers
04eec4f6-1c62-4a18-9070-3db39de9fa65 · Nov 5
£5,215 GBP
$6,980 USD
View
7 more retailers have this diamond
Prices start from £2,300 GBPSave up to £2,914 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
£2,300 GBP