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Cushion|Lab Grown|IGI

1.51ct I SI1 Cushion Lab Grown Diamond

ID • I/SI1 • IGI LG436045068

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG436045068

Diamond specifications and retailer prices

From $2,393 USD
As of November 6, 2026
Save $2,469 USD (51%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $4,862 USD at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown cushion diamond

This 1.51ct 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 LG436045068 or 436045068. Listed at 4 retailers as of November 1, 2026, with prices from $2,393 to $4,862, a $2,469 spread on the same certified stone. MOH London lists it at $4,862. 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

1.51
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045068
Dimensions6.67 × 6.61 × 4.50 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.67 mm6.61 mm1.51 ctI / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436045068
Side View
Table 60.5%Crown 33.2°Girdle: MED-THKPavilion 39.2°Culet: NoneDepth 68.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $4,862 USD|Low: $1,513 USD|High: $4,926 USD|Avg: $2,842 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4$1,513 USD
Retailer 5$2,084 USD
Retailer 3$2,393 USD
Retailer 2$2,395 USD
MOH London$4,862 USD

14 data points across 5 retailers

4 retailers$2,393 USD to $4,862 USD

Retailer 1
-
$1,513 USD
Price last confirmed 25 days ago
B
Retailer 2
-
$2,393 USD
View
B
Retailer 3
-
$2,395 USD
View
Most Expensive
B
MOH London
LG436045068 · Nov 1
$4,862 USD
£3,828 GBP
View
3 more retailers have this diamond
Prices start from $2,393 USDSave up to $2,469 USD

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
1.51ct Cushion
$2,393 USD