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Cushion|Lab Grown|IGI

1.51ct I VS1 Cushion Lab Grown Diamond

EX • I/VS1 • IGI LG649405817

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG649405817

Diamond specifications and retailer prices

From $352 USD
As of October 30, 2026
Save $942 USD (73%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $1,294 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 VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG649405817 or 649405817. Listed at 8 retailers as of October 30, 2026, with prices from $352 to $1,294, a $942 spread on the same certified stone. MOH London lists it at $1,294. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
I
Color
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG649405817
Dimensions6.56 × 6.53 × 4.47 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.56 mm6.53 mm1.51 ctI / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG649405817
Side View
Table 60.0%Crown 37.7°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 68.5%

Caratlytics Score

How it works →
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: Oct 30
Current: $1,294 USD|Low: $351 USD|High: $1,311 USD|Avg: $787 USD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 2$352 USD
Retailer 4$495 USD
Retailer 5$544 USD
Retailer 3$790 USD
Retailer 7$820 USD
Retailer 6$1,207 USD
MOH London$1,294 USD

15 data points across 7 retailers

8 retailers$352 USD to $1,294 USD

A
Cheapest Retailer
-
$352 USD
A
Retailer 2
-
$495 USD
View
A
Retailer 3
-
$544 USD
View
Retailer 4
-
$790 USD
View
Price last confirmed 11 days ago
Retailer 5
-
$800 USD
View
Price last confirmed 83 days ago
Retailer 6
-
$810 USD
View
Price last confirmed 27 days ago
B
Retailer 7
-
$1,207 USD
View
Most Expensive
B
MOH London
LG649405817 · Nov 1
$1,294 USD
£1,019 GBP
View
7 more retailers have this diamond
Prices start from $352 USDSave up to $942 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.

A
1.51ct Cushion
$352 USD