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Cushion|Lab Grown|IGI

3.40ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG500150031

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG500150031

Diamond specifications and retailer prices

From $3,660 USD
As of October 30, 2026
Save $8,244 USD (69%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $25,889 USD at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 3.4ct lab-grown cushion diamond

This 3.4ct lab-grown cushion sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG500150031 or 500150031. Listed at 10 retailers as of October 26, 2026, with a 225% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.40
Carat
H
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.2°
Pavilion angle32.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500150031
Dimensions8.54 × 8.21 × 5.35 mm
L/W Ratio1.04
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
8.54 mm8.21 mm3.40 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500150031
Side View
Table 64.0%Crown 36.2°Girdle: STK-VTKPavilion 32.5°Culet: NoneDepth 65.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $25,889 USD|Low: $3,660 USD|High: $29,154 USD|Avg: $15,285 USD|-9.1%
Cape Diamonds
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 2$3,660 USD
Retailer 5$8,890 USD
Retailer 13$10,307 USD
Retailer 10$10,765 USD
Retailer 8$11,149 USD
Retailer 3$11,191 USD
Retailer 9$11,904 USD
Retailer 4$14,364 USD
Retailer 11$15,972 USD
Retailer 6$20,008 USD
Retailer 7$25,770 USD
Cape Diamonds$25,889 USD
Retailer 12$29,154 USD

19 data points across 13 retailers

10 retailers$3,660 USD to $11,904 USD

B+
Cheapest Retailer
-
$3,660 USD
B
Retailer 2
-
$10,307 USD
View
B
Retailer 3
-
$10,765 USD
View
Final sale: no returns
Retailer 4
-
$11,149 USD
View
Price last confirmed 14 days ago
B
Retailer 5
-
$11,904 USD
View
Retailer 6
-
$15,972 USD
£12,576 GBP
View
Price under review
Most Expensive
Cape Diamonds
cert_500150031 · Oct 29
$25,889 USD
ZAR 418,245 ZAR
View
Price under review
6 more retailers have this diamond
Prices start from $3,660 USDSave up to $8,244 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.

B+
3.40ct Cushion
$3,660 USD