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Cushion|Lab Grown|IGI

4.50ct G SI1 Cushion Lab Grown Diamond

VG • G/SI1 • IGI LG811636021

Shape and cutting style on the report: Antique cushion cut

Certificate IGI LG811636021

Diamond specifications and retailer prices

From $1,452 AUD
$1,020 USD
As of November 1, 2026
Save $3,776 AUD (72%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,228 AUD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.5ct lab-grown cushion diamond

This 4.5ct lab-grown cushion sits in the three to five carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG811636021 or 811636021. Listed at 9 retailers as of October 31, 2026, with prices from $1,452 to $5,228, a $3,776 spread on the same certified stone. Taylor and Hart lists it at $5,228. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

4.50
Carat
G
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle38.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811636021
Dimensions11.76 × 8.54 × 5.47 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.76 mm8.54 mm4.50 ctG / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811636021
Side View
Table 54.0%Crown 36.5°Girdle: STK-THKPavilion 38.3°Culet: LargeDepth 64.1%

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 1
Current: $2,316 AUD|Low: $1,452 AUD|High: $5,228 AUD|Avg: $3,441 AUD|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Taylor and Hart
November 2, 2026
Retailer 7$1,452 AUD
Retailer 2$1,751 AUD
Retailer 6$2,152 AUD
Retailer 1$2,316 AUD
Retailer 4$3,347 AUD
Retailer 5$4,420 AUD
Retailer 8$5,050 AUD
Retailer 3$5,129 AUD
Taylor and Hart$5,228 AUD

28 data points across 9 retailers

9 retailers$1,452 AUD to $5,228 AUD

A
Cheapest Retailer
-
$1,452 AUD
$1,020 USD
Final sale: no returns
B+
Retailer 2
-
$1,751 AUD
$1,230 USD
View
B+
Retailer 3
-
$2,152 AUD
$1,512 USD
View
B+
Retailer 4
-
$2,316 AUD
£1,281 GBP
View
B
Retailer 5
-
$3,347 AUD
$2,351 USD
View
Price last confirmed 7 days ago
B
Retailer 6
-
$4,420 AUD
$3,105 USD
View
B
Retailer 7
-
$5,050 AUD
SGD 4,794 SGD
View
B
Retailer 8
-
$5,129 AUD
£2,837 GBP
View
Most Expensive
B
Taylor and Hart
E8F42E0 · Oct 31
$5,228 AUD
$3,673 USD
View
8 more retailers have this diamond
Prices start from $1,452 AUDSave up to $3,776 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
4.50ct Cushion
$1,452 AUD