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Marquise|Natural|IGI

1.00ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 762534832

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 762534832

Diamond specifications and retailer prices

From £1,310 GBP
As of November 4, 2026
Save £1,231 GBP (48%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,647 GBP at NZ Jewellers · As of September 29, 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 SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 762534832. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.9°
Pavilion angle38.5°
OriginNatural
Grading LabIGI
CertificateIGI 762534832
Dimensions9.51 × 5.16 × 3.31 mm
L/W Ratio1.84
Girdle conditionFaceted
Culet sizePointed
Top View
9.51 mm5.16 mm1.00 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 762534832
Side View
Table 57.0%Crown 39.9°Girdle: MED-THKPavilion 38.5°Culet: NoneDepth 64.1%

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 4
Current: £1,602 GBP|Low: £1,310 GBP|High: £2,650 GBP|Avg: £1,718 GBP|-1.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 4, 2026
Retailer 11£1,310 GBP
Retailer 3£1,338 GBP
Retailer 6£1,412 GBP
Retailer 10£1,441 GBP
Retailer 5£1,484 GBP
Retailer 4£1,495 GBP
Retailer 12£1,522 GBP
Retailer 8£1,553 GBP
Retailer 1£1,602 GBP
Retailer 2£1,783 GBP
Retailer 7£1,852 GBP
Retailer 9£2,541 GBP

36 data points across 12 retailers

17 retailers£1,310 GBP to £2,541 GBP

A
Cheapest Retailer
-
£1,310 GBP
A
Retailer 2
-
£1,338 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,412 GBP
View
B+
Retailer 4
-
£1,441 GBP
View
A
Retailer 5
-
£1,484 GBP
View
B+
Retailer 6
-
£1,495 GBP
View
Retailer 7
-
£1,495 GBP
View
Price last confirmed 34 days ago
Retailer 8
-
£1,495 GBP
View
Price last confirmed 19 days ago
B+
Retailer 9
-
£1,522 GBP
View
B+
Retailer 10
-
£1,553 GBP
View
Retailer 11
-
£1,564 GBP
View
Price last confirmed 34 days ago
A
Retailer 12
-
£1,602 GBP
View
Retailer 13
-
£1,725 GBP
View
Price last confirmed 36 days ago
A
Retailer 14
-
£1,783 GBP
View
B+
Retailer 15
-
£1,852 GBP
View
B
Retailer 16
-
£2,541 GBP
View
Most Expensive
NZ Jewellers
b31b10f4-26db-44c4-b8fb-a902b32e320e · Sep 29
£3,647 GBP
$4,891 USD
View
Price last confirmed 35 days ago
16 more retailers have this diamond
Prices start from £1,310 GBPSave up to £1,231 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
£1,310 GBP