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Marquise|Lab Grown|IGI

1.00ct H SI1 Marquise Lab Grown Diamond

ID • H/SI1 • IGI LG436072901

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG436072901

Diamond specifications and retailer prices

From £426 GBP
$571 USD
As of November 2, 2026
Save £1,870 GBP (81%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £2,296 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown marquise diamond

This 1ct 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 LG436072901 or 436072901. Listed at 11 retailers as of November 1, 2026, with prices from £426 to £2,296, a £1,870 spread on the same certified stone. MOH London lists it at £2,296. 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

1.00
Carat
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.8°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072901
Dimensions9.65 × 5.34 × 3.31 mm
L/W Ratio1.81
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
9.65 mm5.34 mm1.00 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436072901
Side View
Table 61.5%Crown 34.8°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.0%

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: £2,296 GBP|Low: £410 GBP|High: £2,323 GBP|Avg: £943 GBP|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5£426 GBP
Retailer 2£433 GBP
Retailer 8£478 GBP
Retailer 6£529 GBP
Retailer 3£627 GBP
Retailer 7£814 GBP
Retailer 9£841 GBP
Retailer 4£1,312 GBP
Retailer 10£1,417 GBP
MOH London£2,296 GBP

20 data points across 10 retailers

11 retailers£426 GBP to £2,296 GBP

A
Cheapest Retailer
-
£426 GBP
$571 USD
A
Retailer 2
-
£433 GBP
$580 USD
View
A
Retailer 3
-
£478 GBP
$640 USD
View
Final sale: no returns
A
Retailer 4
-
£478 GBP
$640 USD
View
Retailer 5
-
£529 GBP
$709 USD
View
Price last confirmed 16 days ago
A
Retailer 6
-
£529 GBP
$709 USD
View
B+
Retailer 7
-
£627 GBP
$840 USD
View
B+
Retailer 8
-
£814 GBP
$1,091 USD
View
B
Retailer 9
-
£1,312 GBP
$1,758 USD
View
B
Retailer 10
-
£1,391 GBP
$1,864 USD
View
Most Expensive
B
MOH London
LG436072901 · Nov 1
£2,296 GBP
View
10 more retailers have this diamond
Prices start from £426 GBPSave up to £1,870 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
£426 GBP