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Cushion|Lab Grown|IGI

3.10ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG500150575

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG500150575

Diamond specifications and retailer prices

From £3,075 GBP
$4,120 USD
As of October 31, 2026
Save £4,265 GBP (58%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £17,654 GBP at Cape Diamonds · As of October 29, 2026
View at Cape Diamonds

About this 3.1ct lab-grown cushion diamond

This 3.1ct 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 LG500150575 or 500150575. Listed at 10 retailers as of October 31, 2026, with a 139% 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

3.10
Carat
H
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG500150575
Dimensions8.33 × 8.05 × 5.11 mm
L/W Ratio1.03
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
8.33 mm8.05 mm3.10 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG500150575
Side View
Table 63.0%Crown 37.6°Girdle: STK-VTKPavilion 32.1°Culet: NoneDepth 63.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £17,654 GBP|Low: £3,075 GBP|High: £19,881 GBP|Avg: £10,894 GBP|-7.5%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 1, 2026
Retailer 6£3,075 GBP
Retailer 12£7,015 GBP
Retailer 9£7,340 GBP
Retailer 7£7,603 GBP
Retailer 3£7,645 GBP
Retailer 8£8,795 GBP
Retailer 4£9,795 GBP
Retailer 10£10,896 GBP
Retailer 5£13,842 GBP
Retailer 2£17,579 GBP
Cape Diamonds£17,654 GBP
Retailer 11£19,881 GBP

19 data points across 12 retailers

10 retailers£3,075 GBP to £7,340 GBP

B
Cheapest Retailer
-
£3,075 GBP
$4,120 USD
B
Retailer 2
-
£7,015 GBP
$9,399 USD
View
B
Retailer 3
-
£7,340 GBP
$9,835 USD
View
Final sale: no returns
Retailer 4
-
£7,603 GBP
$10,187 USD
View
Price last confirmed 16 days ago
Retailer 5
-
£8,795 GBP
$11,785 USD
View
Price under review
Retailer 6
-
£10,896 GBP
View
Price under review
Most Expensive
Cape Diamonds
cert_500150575 · Oct 29
£17,654 GBP
ZAR 382,146 ZAR
View
Price under review
6 more retailers have this diamond
Prices start from £3,075 GBPSave up to £4,265 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.

B
3.10ct Cushion
£3,075 GBP