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Cushion|Lab Grown|IGI

5.05ct E SI1 Cushion Lab Grown Diamond

ID • E/SI1 • IGI LG620431176

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG620431176

Diamond specifications and retailer prices

From $1,350 SGD
$1,056 USD
As of October 31, 2026
Save $5,131 SGD (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,481 SGD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 5.05ct lab-grown cushion diamond

This 5.05ct lab-grown cushion sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620431176 or 620431176. Listed at 14 retailers as of October 29, 2026, with prices from $1,350 to $6,481, a $5,131 spread on the same certified stone. Brilliant Earth lists it at $6,481. 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

5.05
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620431176
Dimensions12.28 × 8.34 × 5.75 mm
L/W Ratio1.47
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
12.28 mm8.34 mm5.05 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620431176
Side View
Table 63.0%Crown 37.7°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 68.9%

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: Oct 31
Current: $6,481 SGD|Low: $1,350 SGD|High: $6,673 SGD|Avg: $2,869 SGD|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 3$1,350 SGD
Retailer 12$1,399 SGD
Retailer 2$1,569 SGD
Retailer 9$1,624 SGD
Retailer 5$1,942 SGD
Retailer 6$2,155 SGD
Retailer 13$2,238 SGD
Retailer 7$2,239 SGD
Retailer 8$2,736 SGD
Retailer 11$2,850 SGD
Retailer 4$4,345 SGD
Retailer 10$4,768 SGD
Brilliant Earth$6,481 SGD

41 data points across 13 retailers

14 retailers$1,350 SGD to $6,481 SGD

A
Cheapest Retailer
-
$1,350 SGD
$1,056 USD
Final sale: no returns
Retailer 2
-
$1,399 SGD
$1,094 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
$1,569 SGD
£966 GBP
View
A
Retailer 4
-
$1,624 SGD
$1,270 USD
View
B+
Retailer 5
-
$1,942 SGD
$1,519 USD
View
B+
Retailer 6
-
$2,155 SGD
£1,327 GBP
View
B+
Retailer 7
-
$2,238 SGD
$1,751 USD
View
B+
Retailer 8
-
$2,239 SGD
€1,668 EUR
View
B+
Retailer 9
-
$2,736 SGD
$2,140 USD
View
B+
Retailer 10
-
$2,850 SGD
$2,229 USD
View
B
Retailer 11
-
$4,345 SGD
$3,399 USD
View
Retailer 12
-
$4,768 SGD
£2,937 GBP
View
Price last confirmed 10 days ago
B
Retailer 13
-
$4,866 SGD
$3,806 USD
View
Most Expensive
B
Brilliant Earth
9193915A · Oct 29
$6,481 SGD
$5,070 USD
View
13 more retailers have this diamond
Prices start from $1,350 SGDSave up to $5,131 SGD

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
5.05ct Cushion
$1,350 SGD