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Marquise|Natural|IGI

1.00ct I SI2 Marquise Natural Diamond

VG • I/SI2 • IGI 803629089

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629089

Diamond specifications and retailer prices

From £1,049 GBP
As of November 6, 2026
Save £984 GBP (48%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,917 GBP at NZ Jewellers · As of September 30, 2026
View at NZ Jewellers

About this 1ct natural marquise diamond

This 1ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629089. Listed at 17 retailers as of November 2, 2026, with a 94% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.00
Carat
I
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle38.5°
Pavilion angle40.9°
OriginNatural
Grading LabIGI
CertificateIGI 803629089
Dimensions9.94 × 5.23 × 3.23 mm
L/W Ratio1.90
Girdle conditionFaceted
Top View
9.94 mm5.23 mm1.00 ctI / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 803629089
Side View
Table 68.0%Crown 38.5°Girdle: MED-THKPavilion 40.9°Culet: NoneDepth 61.8%

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: £1,049 GBP|Low: £1,012 GBP|High: £2,120 GBP|Avg: £1,344 GBP|-5.4%
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£1,049 GBP
Retailer 9£1,071 GBP
Retailer 7£1,187 GBP
Retailer 10£1,196 GBP
Retailer 8£1,213 GBP
Retailer 11£1,228 GBP
Retailer 4£1,233 GBP
Retailer 2£1,380 GBP
Retailer 3£1,422 GBP
Retailer 5£1,585 GBP
Retailer 6£2,033 GBP

26 data points across 11 retailers

17 retailers£1,049 GBP to £2,033 GBP

A
Cheapest Retailer
-
£1,049 GBP
A
Retailer 2
-
£1,071 GBP
View
Final sale: no returns
B+
Retailer 3
-
£1,187 GBP
View
Retailer 4
-
£1,196 GBP
View
Price last confirmed 53 days ago
Retailer 5
-
£1,196 GBP
View
Price last confirmed 36 days ago
Retailer 6
-
£1,196 GBP
View
Price last confirmed 21 days ago
B+
Retailer 7
-
£1,213 GBP
View
B+
Retailer 8
-
£1,228 GBP
View
A
Retailer 9
-
£1,233 GBP
View
Retailer 10
-
£1,251 GBP
View
Price last confirmed 36 days ago
Retailer 11
-
£1,380 GBP
View
Price last confirmed 61 days ago
Retailer 12
-
£1,380 GBP
View
Price last confirmed 38 days ago
Retailer 13
-
£1,380 GBP
View
Price last confirmed 52 days ago
B+
Retailer 14
-
£1,585 GBP
View
B+
Retailer 15
-
£2,033 GBP
View
Retailer 16
-
£2,917 GBP
View
Price last confirmed 49 days ago
Most Expensive
NZ Jewellers
1a3dd88f-90c5-436a-9a72-1b621883f483 · Sep 30
£2,917 GBP
$3,904 USD
View
Price last confirmed 37 days ago
16 more retailers have this diamond
Prices start from £1,049 GBPSave up to £984 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
1.00ct Marquise
£1,049 GBP