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Cushion|Lab Grown|IGI

1.55ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG591369468

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG591369468

Diamond specifications and retailer prices

From $197 USD
As of October 28, 2026
Save $1,493 USD (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $1,690 USD at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 1.55ct lab-grown cushion diamond

This 1.55ct 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 LG591369468 or 591369468. Listed at 14 retailers as of October 28, 2026, with prices from $197 to $1,690, a $1,493 spread on the same certified stone. Do Amore Diamonds lists it at $1,690. 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

1.55
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591369468
Dimensions7.37 × 6.35 × 4.35 mm
L/W Ratio1.16
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
7.37 mm6.35 mm1.55 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591369468
Side View
Table 63.0%Crown 36.5°Girdle: THN-STKPavilion 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 28
Current: $438 USD|Low: $197 USD|High: $1,820 USD|Avg: $740 USD|+4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 7$197 USD
Retailer 9$294 USD
Retailer 2$397 USD
Retailer 1$438 USD
Retailer 8$555 USD
Retailer 5$904 USD
Retailer 3$1,132 USD
Retailer 6$1,290 USD
Retailer 4$1,380 USD

41 data points across 9 retailers

14 retailers$197 USD to $1,690 USD

A
Cheapest Retailer
-
$197 USD
Final sale: no returns
B+
Retailer 2
-
$294 USD
View
A
Retailer 3
-
$364 USD
View
A
Retailer 4
-
$397 USD
€378 EUR
View
A
Retailer 5
-
$438 USD
£345 GBP
View
B+
Retailer 6
-
$555 USD
View
B+
Retailer 7
-
$823 USD
View
B+
Retailer 8
-
$904 USD
View
B
Retailer 9
-
$1,132 USD
£891 GBP
View
B
Retailer 10
-
$1,270 USD
View
B
Retailer 11
-
$1,270 USD
View
B
Retailer 12
-
$1,290 USD
View
B
Retailer 13
-
$1,380 USD
View
Most Expensive
B
Do Amore Diamonds
27-7C1DA9D49 · Oct 29
$1,690 USD
View
13 more retailers have this diamond
Prices start from $197 USDSave up to $1,493 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
1.55ct Cushion
$197 USD