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Marquise|Natural|IGI

1.20ct H SI1 Marquise Natural Diamond

VG • H/SI1 • IGI 819640232

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 819640232

Diamond specifications and retailer prices

From £2,263 GBP
As of November 5, 2026
Save £2,945 GBP (57%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £5,208 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 819640232. Listed at 8 retailers as of November 5, 2026, with prices from £2,263 to £5,208, a £2,945 spread on the same certified stone. NZ Jewellers lists it at £5,208. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.20
Carat
H
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle44.5°
Pavilion angle37.6°
OriginNatural
Grading LabIGI
CertificateIGI 819640232
Dimensions10.81 × 5.37 × 3.43 mm
L/W Ratio2.01
Girdle conditionFaceted
Culet sizeNone
Top View
10.81 mm5.37 mm1.20 ctH / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 819640232
Side View
Table 58.0%Crown 44.5°Girdle: MED-STKPavilion 37.6°Culet: NoneDepth 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 5
Current: £5,208 GBP|Low: £2,198 GBP|High: £5,532 GBP|Avg: £3,724 GBP|-5.8%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 4£2,263 GBP
Retailer 8£2,897 GBP
Retailer 2£2,900 GBP
Retailer 5£2,989 GBP
Retailer 7£2,989 GBP
Retailer 3£3,334 GBP
Retailer 6£4,999 GBP
NZ Jewellers£5,208 GBP

41 data points across 8 retailers

8 retailers£2,263 GBP to £5,208 GBP

A
Cheapest Retailer
-
£2,263 GBP
B+
Retailer 2
-
£2,897 GBP
View
B+
Retailer 3
-
£2,900 GBP
View
B
Retailer 4
-
£2,989 GBP
View
B
Retailer 5
-
£2,989 GBP
View
B
Retailer 6
-
£3,334 GBP
View
B
Retailer 7
-
£4,999 GBP
View
Most Expensive
B
NZ Jewellers
feacff89-567c-431f-b9b9-fe8b2b88d6d9 · Nov 5
£5,208 GBP
$6,971 USD
View
7 more retailers have this diamond
Prices start from £2,263 GBPSave up to £2,945 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
£2,263 GBP