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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

EX • E/SI1 • IGI LG537240878

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG537240878

Diamond specifications and retailer prices

From $207 USD
As of November 6, 2026
Save $941 USD (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,148 USD at Reve Diamonds · As of November 6, 2026
View at Reve 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG537240878 or 537240878. Listed at 14 retailers as of November 6, 2026, with prices from $207 to $1,148, a $941 spread on the same certified stone. Reve Diamonds lists it at $1,148. 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
E
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.4°
Pavilion angle31.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG537240878
Dimensions7.72 × 5.99 × 3.75 mm
L/W Ratio1.29
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
7.72 mm5.99 mm1.51 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG537240878
Side View
Table 60.5%Crown 37.4°Girdle: MED-STKPavilion 31.3°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $410 USD|Low: $207 USD|High: $1,089 USD|Avg: $518 USD|+3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 2$207 USD
Retailer 10$230 USD
Retailer 9$310 USD
Retailer 5$379 USD
Retailer 1$410 USD
Retailer 3$458 USD
Retailer 7$505 USD
Retailer 6$548 USD
Retailer 11$564 USD
Retailer 8$910 USD
Retailer 4$1,076 USD

44 data points across 11 retailers

14 retailers$207 USD to $1,148 USD

A
Cheapest Retailer
-
$207 USD
Final sale: no returns
Retailer 2
-
$230 USD
View
Price last confirmed 12 days ago
B+
Retailer 3
-
$310 USD
View
A
Retailer 4
-
$379 USD
View
A
Retailer 5
-
$410 USD
View
A
Retailer 6
-
$449 USD
View
A
Retailer 7
-
$458 USD
View
A
Retailer 8
-
$505 USD
View
A
Retailer 9
-
$548 USD
View
B+
Retailer 10
-
$564 USD
View
B+
Retailer 11
-
$794 USD
View
B+
Retailer 12
-
$910 USD
View
B
Retailer 13
-
$1,076 USD
View
Most Expensive
B
Reve Diamonds
DD937C927 · Nov 6
$1,148 USD
View
13 more retailers have this diamond
Prices start from $207 USDSave up to $941 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
$207 USD