Marquise|Lab Grown|IGI

1.00ct J SI2 Marquise Lab Grown Diamond

ID • J/SI2 • IGI LG445038679

Certificate IGI LG445038679

Diamond specifications and retailer prices

From £806 GBP
$1,080 USD
As of October 31, 2026
1 retailer carries this diamond
Only listing: £806 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1ct lab-grown marquise diamond

This 1ct lab-grown marquise sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG445038679 or 445038679. Listed at a single retailer as of October 31, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
J
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginLab Grown
Grading LabIGI
CertificateIGI LG445038679
Dimensions9.50 × 5.28 × 3.40 mm
L/W Ratio1.80
Top View
9.50 mm5.28 mm1.00 ctJ / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI LG445038679
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 64.0%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £806 GBP|Low: £806 GBP|High: £851 GBP|Avg: £828 GBP|-5.3%
September 4, 2026
Brilliant Earth£806 GBP

2 data points across 1 retailer

1 retailer

B+
Brilliant Earth
4383240B · Oct 31
£806 GBP
$1,080 USD
View

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B+
1.00ct Marquise
£806 GBP