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Cushion|Lab Grown|IGI

1.51ct D SI1 Cushion Lab Grown Diamond

VG • D/SI1 • IGI LG478103509

Shape and cutting style on the report: Cushion rose cut

Certificate IGI LG478103509

Diamond specifications and retailer prices

From $246 USD
As of November 6, 2026
Save $1,226 USD (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $1,472 USD at MOH London · As of November 5, 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 D colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG478103509 or 478103509. Listed at 18 retailers as of November 5, 2026, with prices from $246 to $1,472, a $1,226 spread on the same certified stone. MOH London lists it at $1,472. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.6°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG478103509
Dimensions7.32 × 6.50 × 4.24 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
7.32 mm6.50 mm1.51 ctD / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG478103509
Side View
Table 62.5%Crown 32.6°Girdle: MED-STKPavilion 39.2°Culet: NoneDepth 65.2%

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 6
Current: $1,472 USD|Low: $211 USD|High: $1,483 USD|Avg: $668 USD|+22.3%
MOH London
Retailer 2
Retailer 3
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Retailer 5
Retailer 6
Retailer 7
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Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
November 7, 2026
Retailer 9$246 USD
Retailer 17$269 USD
Retailer 5$312 USD
Retailer 12$334 USD
Retailer 15$334 USD
Retailer 16$398 USD
Retailer 4$490 USD
Retailer 3$503 USD
Retailer 11$644 USD
Retailer 2$781 USD
Retailer 8$911 USD
Retailer 13$1,025 USD
Retailer 14$1,184 USD
Retailer 6$1,348 USD
Retailer 7$1,383 USD
Retailer 10$1,455 USD
MOH London$1,472 USD

44 data points across 17 retailers

18 retailers$246 USD to $1,472 USD

A
Cheapest Retailer
-
$246 USD
Final sale: no returns
A
Retailer 2
-
$269 USD
View
A
Retailer 3
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$312 USD
View
A
Retailer 4
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$334 USD
View
A
Retailer 5
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$334 USD
View
A
Retailer 6
-
$398 USD
View
B+
Retailer 7
-
$490 USD
View
B+
Retailer 8
-
$503 USD
View
B+
Retailer 9
-
$644 USD
View
B
Retailer 10
-
$781 USD
View
B
Retailer 11
-
$911 USD
View
B
Retailer 12
-
$1,025 USD
View
B
Retailer 13
-
$1,035 USD
View
B
Retailer 14
-
$1,184 USD
View
B
Retailer 15
-
$1,348 USD
View
B
Retailer 16
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$1,383 USD
View
B
Retailer 17
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$1,455 USD
View
Most Expensive
B
MOH London
LG478103509 · Nov 5
$1,472 USD
£1,159 GBP
View
17 more retailers have this diamond
Prices start from $246 USDSave up to $1,226 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
$246 USD