CaratHunter
Plans
Marquise|Natural|GIA

1.20ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 2566156667

Certificate GIA 2566156667

Diamond specifications and retailer prices

From £1,824 GBP
As of November 5, 2026
Save £1,375 GBP (43%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £3,199 GBP at Wholesale Diamonds Direct · As of November 3, 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 2566156667. Listed at 10 retailers as of November 3, 2026, with prices from £1,824 to £3,199, a £1,375 spread on the same certified stone. Wholesale Diamonds Direct lists it at £3,199. 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
SymmetryVery Good
FluorescenceStrong
Crown angle37.99°
Pavilion angle37.89°
OriginNatural
Grading LabGIA
CertificateGIA 2566156667
Dimensions10.60 × 5.54 × 3.31 mm
L/W Ratio1.91
Culet sizeNone
Top View
10.60 mm5.54 mm1.20 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceStrong
CertificateGIA 2566156667
Side View
Table 61.0%Crown 37.99°Girdle: VTN-THKPavilion 37.89°Culet: NoneDepth 59.8%

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 5
Current: £3,018 GBP|Low: £1,814 GBP|High: £3,393 GBP|Avg: £2,364 GBP|+19.1%
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 2£1,824 GBP
Retailer 5£1,937 GBP
Retailer 9£2,091 GBP
Retailer 4£2,128 GBP
Retailer 8£2,146 GBP
Retailer 6£2,331 GBP
Retailer 7£2,391 GBP
Retailer 3£2,471 GBP
Retailer 1£3,018 GBP
Wholesale Diamonds Direct£3,199 GBP

34 data points across 10 retailers

10 retailers£1,824 GBP to £3,199 GBP

A
Cheapest Retailer
-
£1,824 GBP
A
Retailer 2
-
£1,937 GBP
View
B+
Retailer 3
-
£2,091 GBP
View
A
Retailer 4
-
£2,128 GBP
View
A
Retailer 5
-
£2,146 GBP
View
B+
Retailer 6
-
£2,331 GBP
View
B+
Retailer 7
-
£2,391 GBP
View
B+
Retailer 8
-
£2,471 GBP
View
B
Retailer 9
-
£3,018 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
348918947 · Nov 3
£3,199 GBP
$4,282 USD
View
9 more retailers have this diamond
Prices start from £1,824 GBPSave up to £1,375 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
£1,824 GBP