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Marquise|Natural|IGI

1.00ct I SI1 Marquise Natural Diamond

VG • I/SI1 • IGI 843628745

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 843628745

Diamond specifications and retailer prices

From £1,115 GBP
As of November 2, 2026
Save £1,832 GBP (62%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £2,947 GBP at NZ Jewellers · As of November 3, 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 843628745. Listed at 13 retailers as of November 2, 2026, with prices from £1,115 to £2,947, a £1,832 spread on the same certified stone. NZ Jewellers lists it at £2,947. 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 angle28.5°
Pavilion angle41.2°
OriginNatural
Grading LabIGI
CertificateIGI 843628745
Dimensions10.75 × 5.25 × 2.98 mm
L/W Ratio2.05
Girdle conditionFaceted
Culet sizeMedium
Top View
10.75 mm5.25 mm1.00 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 843628745
Side View
Table 63.0%Crown 28.5°Girdle: MED-THKPavilion 41.2°Culet: MediumDepth 56.8%

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 2
Current: £2,947 GBP|Low: £1,115 GBP|High: £3,043 GBP|Avg: £1,467 GBP|-3.2%
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
November 3, 2026
Retailer 3£1,115 GBP
Retailer 13£1,120 GBP
Retailer 7£1,122 GBP
Retailer 5£1,208 GBP
Retailer 12£1,208 GBP
Retailer 11£1,233 GBP
Retailer 4£1,264 GBP
Retailer 2£1,377 GBP
Retailer 10£1,394 GBP
Retailer 8£1,475 GBP
Retailer 9£1,649 GBP
Retailer 6£2,116 GBP
NZ Jewellers£2,947 GBP

14 data points across 13 retailers

13 retailers£1,115 GBP to £2,947 GBP

A
Cheapest Retailer
-
£1,115 GBP
Final sale: no returns
A
Retailer 2
-
£1,120 GBP
View
A
Retailer 3
-
£1,122 GBP
View
A
Retailer 4
-
£1,208 GBP
View
A
Retailer 5
-
£1,208 GBP
View
A
Retailer 6
-
£1,233 GBP
View
A
Retailer 7
-
£1,264 GBP
View
A
Retailer 8
-
£1,377 GBP
View
B+
Retailer 9
-
£1,394 GBP
View
A
Retailer 10
-
£1,475 GBP
View
A
Retailer 11
-
£1,649 GBP
View
B+
Retailer 12
-
£2,116 GBP
View
Most Expensive
B
NZ Jewellers
dd248388-ee08-40d2-9639-c78f6ee0dd9a · Nov 3
£2,947 GBP
$3,952 USD
View
12 more retailers have this diamond
Prices start from £1,115 GBPSave up to £1,832 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
£1,115 GBP