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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 $1,893 NZD
$1,065 USD
As of November 2, 2026
Save $4,035 NZD (68%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $5,927 NZD 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 $1,893 to $5,927, a $4,035 spread on the same certified stone. MOH London lists it at $5,927. 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

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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: Nov 2
Current: $5,927 NZD|Low: $1,582 NZD|High: $6,006 NZD|Avg: $3,563 NZD
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 4$1,582 NZD
Retailer 3$1,893 NZD
Retailer 8$2,255 NZD
Retailer 2$2,423 NZD
Retailer 5$2,558 NZD
Retailer 6$5,323 NZD
Retailer 7$5,460 NZD
MOH London$5,927 NZD

40 data points across 8 retailers

9 retailers$1,893 NZD to $5,927 NZD

Retailer 1
-
$1,582 NZD
$890 USD
Price last confirmed 21 days ago
A
Retailer 2
-
$1,893 NZD
$1,065 USD
View
B+
Retailer 3
-
$2,255 NZD
$1,269 USD
View
B+
Retailer 4
-
$2,423 NZD
£1,074 GBP
View
B+
Retailer 5
-
$2,558 NZD
$1,439 USD
View
B
Retailer 6
-
$4,159 NZD
$2,340 USD
View
B
Retailer 7
-
$5,323 NZD
SGD 4,047 SGD
View
B
Retailer 8
-
$5,460 NZD
$3,072 USD
View
Most Expensive
B
MOH London
LG830689146 · Nov 3
$5,927 NZD
£2,626 GBP
View
8 more retailers have this diamond
Prices start from $1,893 NZDSave up to $4,035 NZD

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
$1,893 NZD