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Marquise|Natural|IGI

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 712558468

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 712558468

Diamond specifications and retailer prices

From £1,940 GBP
As of November 5, 2026
Save £2,167 GBP (53%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,107 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 I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 712558468. Listed at 15 retailers as of November 5, 2026, with prices from £1,940 to £4,107, a £2,167 spread on the same certified stone. NZ Jewellers lists it at £4,107. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.8°
Pavilion angle39.1°
OriginNatural
Grading LabIGI
CertificateIGI 712558468
Dimensions10.73 × 5.29 × 3.40 mm
L/W Ratio2.03
Girdle conditionFaceted
Top View
10.73 mm5.29 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 712558468
Side View
Table 60.0%Crown 41.8°Girdle: THK-VTKPavilion 39.1°Culet: NoneDepth 64.3%

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: £4,107 GBP|Low: £1,929 GBP|High: £4,107 GBP|Avg: £2,645 GBP
NZ Jewellers
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
November 6, 2026
Retailer 10£1,940 GBP
Retailer 6£2,111 GBP
Retailer 13£2,114 GBP
Retailer 4£2,133 GBP
Retailer 3£2,210 GBP
Retailer 14£2,312 GBP
Retailer 7£2,357 GBP
Retailer 8£2,435 GBP
Retailer 15£2,448 GBP
Retailer 12£2,695 GBP
Retailer 5£2,720 GBP
Retailer 9£2,821 GBP
Retailer 2£3,489 GBP
Retailer 11£3,855 GBP
NZ Jewellers£4,107 GBP

12 data points across 15 retailers

15 retailers£1,940 GBP to £4,107 GBP

A
Cheapest Retailer
-
£1,940 GBP
B+
Retailer 2
-
£2,111 GBP
View
A
Retailer 3
-
£2,114 GBP
View
B+
Retailer 4
-
£2,133 GBP
View
Final sale: no returns
B+
Retailer 5
-
£2,210 GBP
View
Retailer 6
-
£2,312 GBP
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£2,357 GBP
View
B+
Retailer 8
-
£2,435 GBP
View
B+
Retailer 9
-
£2,448 GBP
View
B+
Retailer 10
-
£2,695 GBP
View
B
Retailer 11
-
£2,720 GBP
View
B
Retailer 12
-
£2,821 GBP
View
B
Retailer 13
-
£3,489 GBP
View
B
Retailer 14
-
£3,855 GBP
View
Most Expensive
B
NZ Jewellers
7882e09e-f60e-485f-a5cf-6d3b55008840 · Nov 5
£4,107 GBP
$5,497 USD
View
14 more retailers have this diamond
Prices start from £1,940 GBPSave up to £2,167 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
£1,940 GBP