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Marquise|Natural|GIA

1.20ct H SI2 Marquise Natural Diamond

ID • H/SI2 • GIA 2245019738

Certificate GIA 2245019738

Diamond specifications and retailer prices

From £1,855 GBP
As of November 6, 2026
Save £2,456 GBP (57%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,540 GBP at NZ Jewellers · As of September 30, 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 H 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 2245019738. Listed at 13 retailers as of November 4, 2026, with a 132% 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
H
Colour
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
OriginNatural
Grading LabGIA
CertificateGIA 2245019738
Dimensions10.38 × 5.60 × 3.49 mm
L/W Ratio1.85
Girdle conditionFaceted
Top View
10.38 mm5.60 mm1.20 ctH / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2245019738
Side View
Table 64.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £1,855 GBP|Low: £1,855 GBP|High: £4,410 GBP|Avg: £2,640 GBP|-3.0%
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 1£1,855 GBP
Retailer 11£1,958 GBP
Retailer 2£1,996 GBP
Retailer 8£2,050 GBP
Retailer 10£2,161 GBP
Retailer 4£2,266 GBP
Retailer 6£2,356 GBP
Retailer 9£2,378 GBP
Retailer 5£2,815 GBP
Retailer 3£3,815 GBP
Retailer 7£4,310 GBP

42 data points across 11 retailers

13 retailers£1,855 GBP to £4,310 GBP

A
Cheapest Retailer
-
£1,855 GBP
A
Retailer 2
-
£1,958 GBP
View
A
Retailer 3
-
£1,996 GBP
View
A
Retailer 4
-
£2,050 GBP
View
A
Retailer 5
-
£2,161 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,266 GBP
View
A
Retailer 7
-
£2,356 GBP
View
B+
Retailer 8
-
£2,378 GBP
View
B+
Retailer 9
-
£2,597 GBP
View
B+
Retailer 10
-
£2,815 GBP
View
B
Retailer 11
-
£3,815 GBP
View
B
Retailer 12
-
£4,310 GBP
View
Most Expensive
NZ Jewellers
9e961de1-7eed-4ec8-b3b7-9dc5e0a491bd · Sep 30
£4,540 GBP
$6,110 USD
View
Price last confirmed 37 days ago
12 more retailers have this diamond
Prices start from £1,855 GBPSave up to £2,456 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
£1,855 GBP