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Cushion|Lab Grown|IGI

3.05ct H VS1 Cushion Lab Grown Diamond

EX • H/VS1 • IGI LG828606396

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG828606396

Diamond specifications and retailer prices

From £278 GBP
$373 USD
As of November 1, 2026
Save £297 GBP (52%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £575 GBP at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 3.05ct lab-grown cushion diamond

This 3.05ct 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 LG828606396 or 828606396. Listed at 2 retailers as of November 1, 2026, with prices from £278 to £575, a £297 spread on the same certified stone. 77 Diamonds lists it at £575. 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

3.05
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle39.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828606396
Dimensions8.53 × 8.36 × 5.55 mm
L/W Ratio1.02
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.53 mm8.36 mm3.05 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828606396
Side View
Table 61.0%Crown 34.6°Girdle: MED-THKPavilion 39.4°Culet: NoneDepth 66.4%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £575 GBP|Low: £278 GBP|High: £1,122 GBP|Avg: £656 GBP|-9.9%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2£278 GBP
Retailer 3£451 GBP
Retailer 6£524 GBP
77 Diamonds£575 GBP
Retailer 4£715 GBP
Retailer 5£1,122 GBP

38 data points across 6 retailers

2 retailers£278 GBP to £575 GBP

A
Cheapest Retailer
-
£278 GBP
$373 USD
Final sale: no returns
Most Expensive
A
77 Diamonds
CUSTVST3YXDCTK · Nov 2
£575 GBP
View
1 more retailer has this diamond
Prices start from £278 GBPSave up to £297 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
3.05ct Cushion
£278 GBP