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Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2556199559

Certificate GIA 2556199559

Diamond specifications and retailer prices

From £2,122 GBP
As of November 4, 2026
Save £1,669 GBP (44%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £3,791 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

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 2556199559. Listed at 11 retailers as of November 4, 2026, with prices from £2,122 to £3,791, a £1,669 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,791. 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
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.64°
Pavilion angle39.18°
OriginNatural
Grading LabGIA
CertificateGIA 2556199559
Dimensions11.28 × 5.34 × 3.34 mm
L/W Ratio2.11
Top View
11.28 mm5.34 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556199559
Side View
Table 59.0%Crown 39.64°Girdle: MED-THKPavilion 39.18°Culet: NoneDepth 62.5%

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 4
Current: £2,258 GBP|Low: £2,122 GBP|High: £4,182 GBP|Avg: £2,702 GBP|-8.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
November 6, 2026
Retailer 5£2,122 GBP
Retailer 4£2,173 GBP
Retailer 1£2,258 GBP
Retailer 6£2,288 GBP
Retailer 3£2,477 GBP
Retailer 9£2,556 GBP
Retailer 7£2,725 GBP
Retailer 8£2,784 GBP
Retailer 2£2,823 GBP
Wholesale Diamonds Direct£3,791 GBP

39 data points across 10 retailers

11 retailers£2,122 GBP to £3,791 GBP

A
Cheapest Retailer
-
£2,122 GBP
A
Retailer 2
-
£2,173 GBP
View
A
Retailer 3
-
£2,258 GBP
View
A
Retailer 4
-
£2,288 GBP
View
B+
Retailer 5
-
£2,477 GBP
View
B+
Retailer 6
-
£2,556 GBP
View
B+
Retailer 7
-
£2,725 GBP
View
B+
Retailer 8
-
£2,784 GBP
View
B+
Retailer 9
-
£2,823 GBP
View
B
Retailer 10
-
£3,071 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
369337227 · Nov 6
£3,791 GBP
$5,075 USD
View
10 more retailers have this diamond
Prices start from £2,122 GBPSave up to £1,669 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
£2,122 GBP