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Marquise|Natural|IGI

1.05ct J SI1 Marquise Natural Diamond

VG • J/SI1 • IGI 803629059

Shape and cutting style on the report: Marquise brilliant

Certificate IGI 803629059

Diamond specifications and retailer prices

From £1,208 GBP
As of November 6, 2026
Save £2,075 GBP (63%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,283 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.05ct natural marquise diamond

This 1.05ct natural marquise sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 803629059. Listed at 17 retailers as of November 5, 2026, with prices from £1,208 to £3,283, a £2,075 spread on the same certified stone. NZ Jewellers lists it at £3,283. 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

1.05
Carat
J
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle42°
OriginNatural
Grading LabIGI
CertificateIGI 803629059
Dimensions10.25 × 5.23 × 3.37 mm
L/W Ratio1.96
Girdle conditionFaceted
Top View
10.25 mm5.23 mm1.05 ctJ / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 803629059
Side View
Table 64.0%Crown 37.5°Girdle: STK-THKPavilion 42°Culet: NoneDepth 64.4%

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: £3,283 GBP|Low: £1,208 GBP|High: £3,383 GBP|Avg: £1,719 GBP|-3.0%
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
November 6, 2026
Retailer 9£1,208 GBP
Retailer 2£1,224 GBP
Retailer 10£1,287 GBP
Retailer 4£1,346 GBP
Retailer 5£1,352 GBP
Retailer 8£1,387 GBP
Retailer 15£1,390 GBP
Retailer 16£1,408 GBP
Retailer 6£1,409 GBP
Retailer 11£1,428 GBP
Retailer 12£1,496 GBP
Retailer 13£1,530 GBP
Retailer 14£1,643 GBP
Retailer 7£1,838 GBP
Retailer 3£2,359 GBP
NZ Jewellers£3,283 GBP

30 data points across 16 retailers

17 retailers£1,208 GBP to £3,283 GBP

A
Cheapest Retailer
-
£1,208 GBP
A
Retailer 2
-
£1,224 GBP
View
Final sale: no returns
A
Retailer 3
-
£1,287 GBP
View
A
Retailer 4
-
£1,346 GBP
View
B+
Retailer 5
-
£1,352 GBP
View
Retailer 6
-
£1,387 GBP
View
Price last confirmed 9 days ago
Retailer 7
-
£1,387 GBP
View
Price last confirmed 22 days ago
B+
Retailer 8
-
£1,390 GBP
View
A
Retailer 9
-
£1,408 GBP
View
B+
Retailer 10
-
£1,409 GBP
View
B+
Retailer 11
-
£1,428 GBP
View
B+
Retailer 12
-
£1,496 GBP
View
B+
Retailer 13
-
£1,530 GBP
View
B+
Retailer 14
-
£1,643 GBP
View
B+
Retailer 15
-
£1,838 GBP
View
B
Retailer 16
-
£2,359 GBP
View
Most Expensive
B
NZ Jewellers
df244d37-a841-4774-a08c-ce483326442f · Nov 5
£3,283 GBP
$4,394 USD
View
16 more retailers have this diamond
Prices start from £1,208 GBPSave up to £2,075 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
1.05ct Marquise
£1,208 GBP