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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 $1,503 AUD
$1,056 USD
As of October 29, 2026
Save $5,714 AUD (79%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $7,217 AUD 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 $1,503 to $7,217, a $5,714 spread on the same certified stone. Brilliant Earth lists it at $7,217. 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

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 29
Current: $7,217 AUD|Low: $1,503 AUD|High: $7,430 AUD|Avg: $3,211 AUD|-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$1,503 AUD
Retailer 12$1,557 AUD
Retailer 2$1,747 AUD
Retailer 9$1,808 AUD
Retailer 5$2,162 AUD
Retailer 6$2,400 AUD
Retailer 13$2,492 AUD
Retailer 7$2,493 AUD
Retailer 8$3,046 AUD
Retailer 11$3,173 AUD
Retailer 4$4,838 AUD
Retailer 10$5,309 AUD
Brilliant Earth$7,217 AUD

43 data points across 13 retailers

14 retailers$1,503 AUD to $7,217 AUD

A
Cheapest Retailer
-
$1,503 AUD
$1,056 USD
Final sale: no returns
Retailer 2
-
$1,557 AUD
$1,094 USD
View
Price last confirmed 17 days ago
A
Retailer 3
-
$1,747 AUD
£966 GBP
View
A
Retailer 4
-
$1,808 AUD
$1,270 USD
View
B+
Retailer 5
-
$2,162 AUD
$1,519 USD
View
B+
Retailer 6
-
$2,400 AUD
£1,327 GBP
View
B+
Retailer 7
-
$2,492 AUD
$1,751 USD
View
B+
Retailer 8
-
$2,493 AUD
€1,668 EUR
View
B+
Retailer 9
-
$3,046 AUD
$2,140 USD
View
B+
Retailer 10
-
$3,173 AUD
$2,229 USD
View
B
Retailer 11
-
$4,838 AUD
$3,399 USD
View
Retailer 12
-
$5,309 AUD
£2,937 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
$5,418 AUD
$3,806 USD
View
Most Expensive
B
Brilliant Earth
9193915A · Oct 29
$7,217 AUD
$5,070 USD
View
13 more retailers have this diamond
Prices start from $1,503 AUDSave up to $5,714 AUD

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
$1,503 AUD