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Marquise|Lab Grown|IGI

1.05ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG843623987

Shape and cutting style on the report: Marquise rose cut

Certificate IGI LG843623987

Diamond specifications and retailer prices

From £2,594 GBP
As of November 6, 2026
Save £1,166 GBP (31%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £5,127 GBP at Yorxs · As of October 25, 2026
View at Yorxs

About this 1.05ct lab-grown marquise diamond

This 1.05ct lab-grown marquise sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG843623987 or 843623987. Listed at 11 retailers as of November 6, 2026, with a 45% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.05
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.1°
Pavilion angle35.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843623987
Dimensions8.94 × 5.79 × 2.98 mm
L/W Ratio1.54
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.94 mm5.79 mm1.05 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843623987
Side View
Table 62.0%Crown 35.1°Girdle: MED-STKPavilion 35.2°Culet: NoneDepth 51.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: £4,362 GBP|Low: £2,594 GBP|High: £8,927 GBP|Avg: £4,282 GBP|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Yorxs
November 6, 2026
Retailer 6£2,594 GBP
Retailer 2£2,823 GBP
Retailer 5£2,901 GBP
Retailer 9£2,905 GBP
Retailer 8£3,009 GBP
Retailer 10£3,760 GBP
Retailer 1£4,362 GBP
Retailer 4£4,667 GBP
Yorxs£5,127 GBP
Retailer 3£6,428 GBP
Retailer 7£8,758 GBP

14 data points across 11 retailers

11 retailers£2,594 GBP to £3,760 GBP

B
Cheapest Retailer
-
£2,594 GBP
B
Retailer 2
-
£2,823 GBP
View
B
Retailer 3
-
£2,901 GBP
View
B
Retailer 4
-
£2,905 GBP
View
Final sale: no returns
B
Retailer 5
-
£3,009 GBP
View
B
Retailer 6
-
£3,760 GBP
View
Retailer 7
-
£4,362 GBP
View
Price under review
Retailer 8
-
£4,667 GBP
View
Price under review
Most Expensive
Yorxs
EABCA05B2 · Oct 25
£5,127 GBP
€6,572 EUR
View
Price under review
8 more retailers have this diamond
Prices start from £2,594 GBPSave up to £1,166 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.

B
1.05ct Marquise
£2,594 GBP