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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2557877511

Certificate GIA 2557877511

Diamond specifications and retailer prices

From £2,221 GBP
As of November 6, 2026
Save £2,973 GBP (57%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,195 GBP at NZ Jewellers · As of November 5, 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 I 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 2557877511. Listed at 19 retailers as of November 5, 2026, with prices from £2,221 to £5,195, a £2,973 spread on the same certified stone. NZ Jewellers lists it at £5,195. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2557877511
Dimensions10.35 × 5.44 × 3.47 mm
L/W Ratio1.90
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Twinning Wisp, Cavity, Needle
Top View
10.35 mm5.44 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557877511
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NDepth 63.9%

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: £5,195 GBP|Low: £2,221 GBP|High: £5,195 GBP|Avg: £3,228 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
November 6, 2026
Retailer 2£2,221 GBP
Retailer 13£2,776 GBP
Retailer 4£2,832 GBP
Retailer 7£2,932 GBP
Retailer 3£2,982 GBP
Retailer 11£2,982 GBP
Retailer 12£2,982 GBP
Retailer 9£3,002 GBP
Retailer 5£3,041 GBP
Retailer 6£3,164 GBP
Retailer 8£3,271 GBP
Retailer 14£3,440 GBP
Retailer 10£4,985 GBP
NZ Jewellers£5,195 GBP

30 data points across 14 retailers

19 retailers£2,221 GBP to £5,195 GBP

A
Cheapest Retailer
-
£2,221 GBP
B+
Retailer 2
-
£2,370 GBP
View
Final sale: no returns
B+
Retailer 3
-
£2,478 GBP
View
B+
Retailer 4
-
£2,624 GBP
View
B+
Retailer 5
-
£2,776 GBP
View
B+
Retailer 6
-
£2,832 GBP
View
B+
Retailer 7
-
£2,932 GBP
View
B
Retailer 8
-
£2,982 GBP
View
B
Retailer 9
-
£2,982 GBP
View
Retailer 10
-
£2,982 GBP
View
Price last confirmed 9 days ago
B+
Retailer 11
-
£3,002 GBP
View
B
Retailer 12
-
£3,041 GBP
View
B
Retailer 13
-
£3,091 GBP
View
B
Retailer 14
-
£3,164 GBP
View
B
Retailer 15
-
£3,175 GBP
View
B+
Retailer 16
-
£3,271 GBP
View
B
Retailer 17
-
£3,440 GBP
View
B
Retailer 18
-
£4,985 GBP
View
Most Expensive
C
NZ Jewellers
c2a31624-9175-4791-8f74-0e7976ecf87d · Nov 5
£5,195 GBP
$6,953 USD
View
18 more retailers have this diamond
Prices start from £2,221 GBPSave up to £2,973 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
£2,221 GBP