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Cushion|Lab Grown|IGI

4.08ct F SI1 Cushion Lab Grown Diamond

VG • F/SI1 • IGI LG830689146

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG830689146

Diamond specifications and retailer prices

From $1,520 AUD
$1,065 USD
As of November 2, 2026
Save $3,239 AUD (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $4,759 AUD at MOH London · As of November 3, 2026
View at MOH London

About this 4.08ct lab-grown cushion diamond

This 4.08ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG830689146 or 830689146. Listed at 9 retailers as of November 2, 2026, with prices from $1,520 to $4,759, a $3,239 spread on the same certified stone. MOH London lists it at $4,759. 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

4.08
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle36.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830689146
Dimensions11.91 × 8.45 × 5.51 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.91 mm8.45 mm4.08 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830689146
Side View
Table 53.0%Crown 40.6°Girdle: MED-STKPavilion 36.3°Culet: LargeDepth 65.2%

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 2
Current: $4,759 AUD|Low: $1,270 AUD|High: $4,822 AUD|Avg: $2,860 AUD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$1,270 AUD
Retailer 3$1,520 AUD
Retailer 8$1,811 AUD
Retailer 2$1,945 AUD
Retailer 5$2,053 AUD
Retailer 6$4,273 AUD
Retailer 7$4,384 AUD
MOH London$4,759 AUD

40 data points across 8 retailers

9 retailers$1,520 AUD to $4,759 AUD

Retailer 1
-
$1,270 AUD
$890 USD
Price last confirmed 21 days ago
A
Retailer 2
-
$1,520 AUD
$1,065 USD
View
B+
Retailer 3
-
$1,811 AUD
$1,269 USD
View
B+
Retailer 4
-
$1,945 AUD
£1,074 GBP
View
B+
Retailer 5
-
$2,053 AUD
$1,439 USD
View
B
Retailer 6
-
$3,339 AUD
$2,340 USD
View
B
Retailer 7
-
$4,273 AUD
SGD 4,047 SGD
View
B
Retailer 8
-
$4,384 AUD
$3,072 USD
View
Most Expensive
B
MOH London
LG830689146 · Nov 3
$4,759 AUD
£2,626 GBP
View
8 more retailers have this diamond
Prices start from $1,520 AUDSave up to $3,239 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
4.08ct Cushion
$1,520 AUD