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Cushion|Lab Grown|IGI

3.55ct G VS1 Cushion Lab Grown Diamond

ID • G/VS1 • IGI LG688511564

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG688511564

Diamond specifications and retailer prices

From £420 GBP
HK$4,400 HKD
As of October 31, 2026
Save £1,070 GBP (72%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,490 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.55ct lab-grown cushion diamond

This 3.55ct lab-grown cushion sits in the three to five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG688511564 or 688511564. Listed at 13 retailers as of October 29, 2026, with prices from £420 to £1,490, a £1,070 spread on the same certified stone. MOH London lists it at £1,490. 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

3.55
Carat
G
Colour
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG688511564
Dimensions8.98 × 8.81 × 5.86 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.98 mm8.81 mm3.55 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG688511564
Side View
Table 65.0%Crown 36.1°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 66.5%

Caratlytics Score

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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 31
Current: £1,490 GBP|Low: £420 GBP|High: £4,247 GBP|Avg: £1,384 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
October 31, 2026
Retailer 14£420 GBP
Retailer 10£424 GBP
Retailer 11£489 GBP
Retailer 2£599 GBP
Retailer 4£600 GBP
Retailer 13£624 GBP
Retailer 9£624 GBP
Retailer 12£798 GBP
Retailer 16£824 GBP
Retailer 15£906 GBP
Retailer 5£1,246 GBP
Retailer 3£1,420 GBP
MOH London£1,490 GBP
Retailer 8£2,559 GBP
Retailer 6£3,099 GBP
Retailer 7£4,247 GBP

5 data points across 16 retailers

13 retailers£420 GBP to £1,490 GBP

A
Cheapest Retailer
-
£420 GBP
HK$4,400 HKD
A
Retailer 2
-
£424 GBP
View
A
Retailer 3
-
£489 GBP
$655 USD
View
A
Retailer 4
-
£599 GBP
€765 EUR
View
B+
Retailer 5
-
£600 GBP
$804 USD
View
A
Retailer 6
-
£624 GBP
$836 USD
View
A
Retailer 7
-
£624 GBP
View
A
Retailer 8
-
£798 GBP
A$1,646 AUD
View
A
Retailer 9
-
£824 GBP
ZAR 17,827 ZAR
View
A
Retailer 10
-
£906 GBP
$1,214 USD
View
B+
Retailer 11
-
£1,246 GBP
$1,669 USD
View
B+
Retailer 12
-
£1,420 GBP
$1,902 USD
View
Most Expensive
B+
MOH London
LG688511564 · Oct 29
£1,490 GBP
View
12 more retailers have this diamond
Prices start from £420 GBPSave up to £1,070 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
3.55ct Cushion
£420 GBP