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Cushion|Lab Grown|IGI

1.98ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG639407553

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG639407553

Diamond specifications and retailer prices

From £1,438 GBP
$1,930 USD
As of November 2, 2026
1 retailer carries this diamond
Only listing: £1,438 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 1.98ct lab-grown cushion diamond

This 1.98ct lab-grown cushion sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG639407553 or 639407553. Listed at a single retailer as of November 2, 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

1.98
Carat
I
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG639407553
Dimensions8.76 × 6.64 × 4.39 mm
L/W Ratio1.32
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.76 mm6.64 mm1.98 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG639407553
Side View
Table 65.0%Crown 34°Girdle: MED-STKPavilion 36.4°Culet: NoneDepth 66.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £1,438 GBP|Low: £150 GBP|High: £1,899 GBP|Avg: £759 GBP|+1.0%
Brilliant Earth
Retailer 2
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Retailer 11
June 1, 2026
Retailer 11£244 GBP
Retailer 3£365 GBP
Retailer 9£372 GBP
Retailer 5£494 GBP
Retailer 4£513 GBP
Retailer 8£545 GBP
Retailer 10£724 GBP
Retailer 7£748 GBP
Retailer 6£770 GBP
Retailer 2£872 GBP
Brilliant Earth£1,438 GBP

60 data points across 11 retailers

1 retailer

B
Brilliant Earth
14251193A · Nov 2
£1,438 GBP
$1,930 USD
View

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B
1.98ct Cushion
£1,438 GBP