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Marquise|Lab Grown|IGI

1.00ct D SI1 Marquise Lab Grown Diamond

ID • D/SI1 • IGI LG831633307

Shape and cutting style on the report: Marquise brilliant

Certificate IGI LG831633307

Diamond specifications and retailer prices

From £230 GBP
As of November 1, 2026
Save £395 GBP (63%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £625 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831633307 or 831633307. Listed at 6 retailers as of November 1, 2026, with prices from £230 to £625, a £395 spread on the same certified stone. MOH London lists it at £625. 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
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle33.5°
Pavilion angle41.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831633307
Dimensions10.01 × 5.25 × 3.27 mm
L/W Ratio1.91
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.01 mm5.25 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG831633307
Side View
Table 65.0%Crown 33.5°Girdle: MED-THKPavilion 41.7°Culet: NoneDepth 62.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £625 GBP|Low: £225 GBP|High: £645 GBP|Avg: £333 GBP|-2.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 2£230 GBP
Retailer 4£234 GBP
Retailer 5£247 GBP
Retailer 6£259 GBP
Retailer 3£372 GBP
MOH London£625 GBP

41 data points across 6 retailers

6 retailers£230 GBP to £625 GBP

A
Cheapest Retailer
-
£230 GBP
A
Retailer 2
-
£234 GBP
$314 USD
View
A
Retailer 3
-
£247 GBP
$331 USD
View
A
Retailer 4
-
£259 GBP
View
B+
Retailer 5
-
£372 GBP
$498 USD
View
Most Expensive
B
MOH London
LG831633307 · Nov 1
£625 GBP
View
5 more retailers have this diamond
Prices start from £230 GBPSave up to £395 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
£230 GBP