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Marquise|Natural|IGI

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 835613875

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 835613875

Diamond specifications and retailer prices

From £1,923 GBP
As of November 6, 2026
Save £2,572 GBP (57%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £4,495 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 835613875. Listed at 18 retailers as of November 5, 2026, with prices from £1,923 to £4,495, a £2,572 spread on the same certified stone. NZ Jewellers lists it at £4,495. 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 angle35.9°
Pavilion angle36.8°
OriginNatural
Grading LabIGI
CertificateIGI 835613875
Dimensions10.43 × 5.51 × 3.46 mm
L/W Ratio1.89
Girdle conditionFaceted
Top View
10.43 mm5.51 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 835613875
Side View
Table 57.0%Crown 35.9°Girdle: STK-VTKPavilion 36.8°Culet: NoneDepth 62.8%

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 6
Current: £4,495 GBP|Low: £1,923 GBP|High: £4,545 GBP|Avg: £2,816 GBP|-1.1%
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
Retailer 16
Retailer 17
Retailer 18
November 6, 2026
Retailer 2£1,923 GBP
Retailer 6£2,290 GBP
Retailer 9£2,432 GBP
Retailer 4£2,469 GBP
Retailer 16£2,488 GBP
Retailer 11£2,503 GBP
Retailer 10£2,580 GBP
Retailer 18£2,580 GBP
Retailer 3£2,679 GBP
Retailer 17£2,688 GBP
Retailer 13£2,702 GBP
Retailer 5£2,731 GBP
Retailer 8£2,824 GBP
Retailer 12£2,828 GBP
Retailer 7£2,977 GBP
Retailer 14£3,149 GBP
Retailer 15£4,303 GBP
NZ Jewellers£4,495 GBP

19 data points across 18 retailers

18 retailers£1,923 GBP to £4,495 GBP

A
Cheapest Retailer
-
£1,923 GBP
B+
Retailer 2
-
£2,290 GBP
View
B+
Retailer 3
-
£2,432 GBP
View
B+
Retailer 4
-
£2,469 GBP
View
B+
Retailer 5
-
£2,488 GBP
View
B+
Retailer 6
-
£2,503 GBP
View
Retailer 7
-
£2,580 GBP
View
Price last confirmed 8 days ago
B+
Retailer 8
-
£2,580 GBP
View
B+
Retailer 9
-
£2,679 GBP
View
B+
Retailer 10
-
£2,688 GBP
View
B+
Retailer 11
-
£2,702 GBP
View
B+
Retailer 12
-
£2,731 GBP
View
B+
Retailer 13
-
£2,824 GBP
View
B+
Retailer 14
-
£2,828 GBP
View
B
Retailer 15
-
£2,977 GBP
View
B
Retailer 16
-
£3,149 GBP
View
B
Retailer 17
-
£4,303 GBP
View
Most Expensive
B
NZ Jewellers
8768dbb9-f8f5-49af-beaf-a7d36c813bfe · Nov 5
£4,495 GBP
$6,017 USD
View
17 more retailers have this diamond
Prices start from £1,923 GBPSave up to £2,572 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
£1,923 GBP