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Cushion|Lab Grown|IGI

4.05ct I VS1 Cushion Lab Grown Diamond

ID • I/VS1 • IGI LG830646771

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG830646771

Diamond specifications and retailer prices

From $1,825 USD
As of October 31, 2026
Save $5,130 USD (74%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $6,955 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 4.05ct lab-grown cushion diamond

This 4.05ct lab-grown cushion sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG830646771 or 830646771. Listed at 10 retailers as of October 31, 2026, with prices from $1,825 to $6,955, a $5,130 spread on the same certified stone. Taylor and Hart lists it at $6,955. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

4.05
Carat
I
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830646771
Dimensions11.64 × 8.04 × 5.20 mm
L/W Ratio1.45
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
11.64 mm8.04 mm4.05 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830646771
Side View
Table 49.0%Crown 37.2°Girdle: THK-VTKPavilion 36.7°Culet: LargeDepth 64.7%

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: Oct 31
Current: $2,841 USD|Low: $1,661 USD|High: $7,566 USD|Avg: $3,636 USD|+2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Taylor and Hart
October 31, 2026
Retailer 2$1,825 USD
Retailer 9$2,086 USD
Retailer 4$2,150 USD
Retailer 7$2,160 USD
Retailer 6$2,580 USD
Retailer 1$2,841 USD
Retailer 3$4,220 USD
Retailer 5$4,910 USD
Retailer 8$6,037 USD
Taylor and Hart$6,955 USD

28 data points across 10 retailers

10 retailers$1,825 USD to $6,955 USD

A
Cheapest Retailer
-
$1,825 USD
B+
Retailer 2
-
$2,086 USD
HK$16,300 HKD
View
B+
Retailer 3
-
$2,150 USD
View
Retailer 4
-
$2,160 USD
View
Price last confirmed 20 days ago
B+
Retailer 5
-
$2,580 USD
View
B+
Retailer 6
-
$2,841 USD
€2,706 EUR
View
B
Retailer 7
-
$4,220 USD
ZAR 68,169 ZAR
View
B
Retailer 8
-
$4,910 USD
View
B
Retailer 9
-
$6,037 USD
SGD 8,158 SGD
View
Most Expensive
B
Taylor and Hart
UMM3CPK · Oct 31
$6,955 USD
View
9 more retailers have this diamond
Prices start from $1,825 USDSave up to $5,130 USD

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
4.05ct Cushion
$1,825 USD