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Marquise|Natural|GIA

1.20ct J SI2 Marquise Natural Diamond

EX • J/SI2 • GIA 2557721221

Certificate GIA 2557721221

Diamond specifications and retailer prices

From £1,626 GBP
As of November 6, 2026
Save £1,972 GBP (55%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,045 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct 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 2557721221. Listed at 15 retailers as of November 4, 2026, with a 121% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
J
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2557721221
Dimensions10.19 × 5.54 × 3.46 mm
L/W Ratio1.84
Girdle conditionFaceted
Key to symbols
Twinning Wisp, Feather, Crystal, Indented Natural, Needle, Knot, Natural, Extra Facet
Top View
10.19 mm5.54 mm1.20 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2557721221
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: Very SmallDepth 62.4%

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: £1,682 GBP|Low: £1,606 GBP|High: £3,845 GBP|Avg: £2,275 GBP|-7.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 8£1,626 GBP
Retailer 1£1,682 GBP
Retailer 2£1,991 GBP
Retailer 6£1,996 GBP
Retailer 3£2,119 GBP
Retailer 11£2,258 GBP
Retailer 9£2,263 GBP
Retailer 5£2,283 GBP
Retailer 10£2,346 GBP
Retailer 4£2,511 GBP
Retailer 7£3,597 GBP

34 data points across 11 retailers

15 retailers£1,626 GBP to £3,597 GBP

A
Cheapest Retailer
-
£1,626 GBP
A
Retailer 2
-
£1,682 GBP
View
B+
Retailer 3
-
£1,991 GBP
View
Final sale: no returns
B+
Retailer 4
-
£1,996 GBP
View
B+
Retailer 5
-
£2,119 GBP
View
B+
Retailer 6
-
£2,258 GBP
View
B+
Retailer 7
-
£2,263 GBP
View
Retailer 8
-
£2,272 GBP
View
Price last confirmed 26 days ago
B+
Retailer 9
-
£2,283 GBP
View
Retailer 10
-
£2,321 GBP
View
Price last confirmed 42 days ago
B
Retailer 11
-
£2,346 GBP
View
B+
Retailer 12
-
£2,511 GBP
View
Retailer 13
-
£2,679 GBP
View
Price last confirmed 39 days ago
B
Retailer 14
-
£3,597 GBP
View
Most Expensive
NZ Jewellers
b32b4b42-4344-4635-bb13-caf0ed669bc1 · Sep 28
£4,045 GBP
$5,414 USD
View
Price last confirmed 39 days ago
14 more retailers have this diamond
Prices start from £1,626 GBPSave up to £1,972 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
1.20ct Marquise
£1,626 GBP