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Cushion|Lab Grown|IGI

1.51ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG519231898

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG519231898

Diamond specifications and retailer prices

From $207 USD
As of November 6, 2026
Save $941 USD (82%) vs most expensive(unlock to see where)
13 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 LG519231898 or 519231898. Listed at 13 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle33.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519231898
Dimensions6.71 × 6.64 × 4.00 mm
L/W Ratio1.01
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
6.71 mm6.64 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519231898
Side View
Table 62.5%Crown 33°Girdle: MED-THKPavilion 33.6°Culet: NoneDepth 60.2%

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: $410 USD|Low: $207 USD|High: $1,110 USD|Avg: $522 USD|+3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 10$207 USD
Retailer 8$230 USD
Retailer 7$310 USD
Retailer 4$379 USD
Retailer 1$410 USD
Retailer 2$458 USD
Retailer 5$548 USD
Retailer 9$564 USD
Retailer 6$910 USD
Retailer 3$1,076 USD

42 data points across 10 retailers

13 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
-
$548 USD
View
B+
Retailer 9
-
$564 USD
View
B+
Retailer 10
-
$794 USD
View
B+
Retailer 11
-
$910 USD
View
B
Retailer 12
-
$1,076 USD
View
Most Expensive
B
Reve Diamonds
51A9E8EA3 · Nov 6
$1,148 USD
View
12 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