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Cushion|Lab Grown|IGI

3.40ct G VS2 Cushion Lab Grown Diamond

ID • G/VS2 • IGI LG670436438

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG670436438

Diamond specifications and retailer prices

From £577 GBP
$773 USD
As of October 26, 2026
Save £2,028 GBP (78%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £2,605 GBP at Do Amore Diamonds · As of October 28, 2026
View at Do Amore Diamonds

About this 3.4ct lab-grown cushion diamond

This 3.4ct lab-grown cushion sits in the three to five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG670436438 or 670436438. Listed at 6 retailers as of October 26, 2026, with prices from £577 to £2,605, a £2,028 spread on the same certified stone. Do Amore Diamonds lists it at £2,605. 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
G
Colour
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG670436438
Dimensions8.57 × 8.54 × 5.84 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.57 mm8.54 mm3.40 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG670436438
Side View
Table 61.0%Crown 34.8°Girdle: MED-THKPavilion 40.2°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
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: Oct 26
Current: £2,605 GBP|Low: £474 GBP|High: £2,784 GBP|Avg: £1,771 GBP|-5.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 28, 2026
Retailer 4£577 GBP
Retailer 2£578 GBP
Retailer 3£1,476 GBP
Retailer 6£2,082 GBP
Retailer 5£2,308 GBP
Do Amore Diamonds£2,605 GBP

17 data points across 6 retailers

6 retailers£577 GBP to £2,605 GBP

B+
Cheapest Retailer
-
£577 GBP
$773 USD
A
Retailer 2
-
£578 GBP
$775 USD
View
B+
Retailer 3
-
£1,476 GBP
View
B
Retailer 4
-
£2,082 GBP
$2,790 USD
View
B
Retailer 5
-
£2,308 GBP
$3,093 USD
View
Most Expensive
B
Do Amore Diamonds
27-C6654E630 · Oct 28
£2,605 GBP
$3,490 USD
View
5 more retailers have this diamond
Prices start from £577 GBPSave up to £2,028 GBP

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
3.40ct Cushion
£577 GBP