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Marquise|Natural|GIA

1.21ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 6555372918

Certificate GIA 6555372918

Diamond specifications and retailer prices

From £1,957 GBP
As of November 5, 2026
Save £2,246 GBP (53%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,203 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 6555372918. Listed at 13 retailers as of November 5, 2026, with prices from £1,957 to £4,203, a £2,246 spread on the same certified stone. NZ Jewellers lists it at £4,203. 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
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle41.16°
Pavilion angle40.57°
OriginNatural
Grading LabGIA
CertificateGIA 6555372918
Dimensions10.55 × 5.49 × 3.51 mm
L/W Ratio1.92
Culet sizeNone
Top View
10.55 mm5.49 mm1.21 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 6555372918
Side View
Table 57.0%Crown 41.16°Girdle: STK-VTKPavilion 40.57°Culet: NoneDepth 63.9%

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 5
Current: £4,203 GBP|Low: £1,567 GBP|High: £4,203 GBP|Avg: £2,054 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 6, 2026
Retailer 5£1,567 GBP
Retailer 6£1,702 GBP
Retailer 3£1,815 GBP
Retailer 10£1,957 GBP
Retailer 16£2,075 GBP
Retailer 12£2,108 GBP
Retailer 7£2,179 GBP
Retailer 13£2,185 GBP
Retailer 8£2,231 GBP
Retailer 11£2,402 GBP
Retailer 2£2,462 GBP
Retailer 14£2,469 GBP
Retailer 9£2,496 GBP
Retailer 4£2,714 GBP
Retailer 15£3,114 GBP
NZ Jewellers£4,203 GBP

31 data points across 16 retailers

13 retailers£1,957 GBP to £4,203 GBP

Retailer 1
-
£1,702 GBP
Price last confirmed 21 days ago
Retailer 2
-
£1,815 GBP
View
Price last confirmed 18 days ago
B+
Retailer 3
-
£1,957 GBP
View
B+
Retailer 4
-
£2,108 GBP
View
B+
Retailer 5
-
£2,170 GBP
View
B+
Retailer 6
-
£2,185 GBP
View
B
Retailer 7
-
£2,402 GBP
View
B
Retailer 8
-
£2,462 GBP
View
B
Retailer 9
-
£2,469 GBP
View
B
Retailer 10
-
£2,496 GBP
View
Retailer 11
-
£2,714 GBP
View
Price last confirmed 19 days ago
B
Retailer 12
-
£3,114 GBP
View
Most Expensive
C
NZ Jewellers
bb823756-70fd-443a-9a0a-294775cc99d0 · Nov 5
£4,203 GBP
$5,626 USD
View
12 more retailers have this diamond
Prices start from £1,957 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.

B+
1.21ct Marquise
£1,957 GBP