CaratHunter
Plans
Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

ID • I/SI1 • GIA 2554704643

Certificate GIA 2554704643

Diamond specifications and retailer prices

From £2,991 GBP
As of November 7, 2026
Save £2,636 GBP (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £5,628 GBP at MOH London · As of November 4, 2026
View at MOH London

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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2554704643. Listed at 14 retailers as of November 4, 2026, with prices from £2,991 to £5,628, a £2,636 spread on the same certified stone. MOH London lists it at £5,628. 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2554704643
Dimensions10.22 × 5.54 × 3.31 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Needle, Natural
Top View
10.22 mm5.54 mm1.20 ctI / SI1
OriginNatural
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2554704643
Side View
Table 59.0%CrownGirdle: THK-VTKPavilionCulet: NoneDepth 59.7%

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 7
Current: £5,628 GBP|Low: £2,524 GBP|High: £5,650 GBP|Avg: £3,511 GBP|-0.4%
MOH London
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
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 7, 2026
Retailer 10£2,524 GBP
Retailer 8£2,652 GBP
Retailer 14£2,811 GBP
Retailer 6£2,991 GBP
Retailer 23£3,059 GBP
Retailer 3£3,176 GBP
Retailer 12£3,183 GBP
Retailer 5£3,239 GBP
Retailer 2£3,284 GBP
Retailer 21£3,293 GBP
Retailer 15£3,323 GBP
Retailer 11£3,455 GBP
Retailer 18£3,467 GBP
Retailer 7£3,519 GBP
Retailer 9£3,519 GBP
Retailer 19£3,522 GBP
Retailer 4£3,529 GBP
Retailer 20£3,764 GBP
Retailer 22£3,798 GBP
Retailer 17£3,859 GBP
Retailer 16£4,007 GBP
Retailer 13£4,492 GBP
Retailer 24£5,175 GBP
MOH London£5,628 GBP

11 data points across 24 retailers

14 retailers£2,991 GBP to £5,628 GBP

B+
Cheapest Retailer
-
£2,991 GBP
B+
Retailer 2
-
£3,059 GBP
View
B
Retailer 3
-
£3,176 GBP
View
B+
Retailer 4
-
£3,239 GBP
View
B+
Retailer 5
-
£3,284 GBP
View
B+
Retailer 6
-
£3,293 GBP
View
B
Retailer 7
-
£3,467 GBP
View
B+
Retailer 8
-
£3,522 GBP
View
B
Retailer 9
-
£3,529 GBP
View
B
Retailer 10
-
£3,764 GBP
View
B
Retailer 11
-
£3,798 GBP
View
B
Retailer 12
-
£4,492 GBP
View
B
Retailer 13
-
£5,175 GBP
View
Most Expensive
B
MOH London
CBAE86CD0 · Nov 4
£5,628 GBP
View
13 more retailers have this diamond
Prices start from £2,991 GBPSave up to £2,636 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+
1.20ct Marquise
£2,991 GBP