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Cushion|Lab Grown|IGI

1.51ct D SI1 Cushion Lab Grown Diamond

ID • D/SI1 • IGI LG476164138

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG476164138

Diamond specifications and retailer prices

From $425 USD
As of November 6, 2026
Save $2,036 USD (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $3,490 USD at Do Amore Diamonds · As of November 6, 2026
View at Do Amore Diamonds

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 top-tier cut grade and certified by IGI LG476164138 or 476164138. Listed at 11 retailers as of November 5, 2026, with a 479% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG476164138
Dimensions7.00 × 6.43 × 4.39 mm
L/W Ratio1.09
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
7.00 mm6.43 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG476164138
Side View
Table 63.0%Crown 34.3°Girdle: MED-STKPavilion 39.9°Culet: NoneDepth 68.3%

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: Nov 6
Current: $3,490 USD|Low: $488 USD|High: $3,490 USD|Avg: $1,362 USD
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 7$488 USD
Retailer 3$599 USD
Retailer 9$731 USD
Retailer 8$775 USD
Retailer 4$880 USD
Retailer 5$1,977 USD
Retailer 2$2,212 USD
Retailer 6$2,461 USD
Do Amore Diamonds$3,490 USD

46 data points across 9 retailers

11 retailers$425 USD to $2,461 USD

A
Cheapest Retailer
-
$425 USD
A
Retailer 2
-
$488 USD
View
A
Retailer 3
-
$599 USD
View
B+
Retailer 4
-
$635 USD
View
B+
Retailer 5
-
$731 USD
View
B+
Retailer 6
-
$775 USD
View
B+
Retailer 7
-
$880 USD
View
B
Retailer 8
-
$1,977 USD
View
B
Retailer 9
-
$2,212 USD
View
B
Retailer 10
-
$2,461 USD
View
Most Expensive
Do Amore Diamonds
27-4C423BE61 · Nov 6
$3,490 USD
View
Price under review
10 more retailers have this diamond
Prices start from $425 USDSave up to $2,036 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
$425 USD