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Cushion|Lab Grown|IGI

3.55ct E IF Cushion Lab Grown Diamond

ID • E/IF • IGI LG843670815

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG843670815

Diamond specifications and retailer prices

From £1,401 GBP
$1,877 USD
As of October 29, 2026
Save £6,279 GBP (82%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £7,680 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 3.55ct lab-grown cushion diamond

This 3.55ct lab-grown cushion sits in the three to five carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG843670815 or 843670815. Listed at 14 retailers as of October 29, 2026, with prices from £1,401 to £7,680, a £6,279 spread on the same certified stone. Do Amore Diamonds lists it at £7,680. 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
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.9°
Pavilion angle34.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843670815
Dimensions11.60 × 7.62 × 4.98 mm
L/W Ratio1.52
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
11.60 mm7.62 mm3.55 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843670815
Side View
Table 56.0%Crown 31.9°Girdle: STK-THKPavilion 34.2°Culet: NoneDepth 65.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £7,680 GBP|Low: £1,276 GBP|High: £8,710 GBP|Avg: £3,615 GBP|+11.6%
Do Amore 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
Retailer 14
Retailer 15
October 30, 2026
Retailer 10£1,401 GBP
Retailer 12£1,422 GBP
Retailer 8£1,578 GBP
Retailer 3£1,946 GBP
Retailer 11£2,321 GBP
Retailer 9£2,543 GBP
Retailer 4£2,896 GBP
Retailer 6£3,520 GBP
Retailer 15£3,598 GBP
Retailer 13£4,104 GBP
Retailer 5£4,109 GBP
Retailer 7£4,993 GBP
Retailer 2£5,486 GBP
Retailer 14£5,744 GBP
Do Amore Diamonds£7,680 GBP

15 data points across 15 retailers

14 retailers£1,401 GBP to £7,680 GBP

A
Cheapest Retailer
-
£1,401 GBP
$1,877 USD
A
Retailer 2
-
£1,422 GBP
$1,905 USD
View
A
Retailer 3
-
£1,578 GBP
View
A
Retailer 4
-
£1,946 GBP
$2,608 USD
View
A
Retailer 5
-
£2,321 GBP
€2,962 EUR
View
A
Retailer 6
-
£2,543 GBP
$3,408 USD
View
Retailer 7
-
£2,896 GBP
A$5,969 AUD
View
Price last confirmed 8 days ago
Retailer 8
-
£3,520 GBP
$4,716 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
£3,598 GBP
$4,822 USD
View
B+
Retailer 10
-
£4,104 GBP
View
Retailer 11
-
£4,109 GBP
$5,505 USD
View
Price last confirmed 9 days ago
B+
Retailer 12
-
£5,486 GBP
$7,350 USD
View
B+
Retailer 13
-
£5,744 GBP
$7,696 USD
View
Most Expensive
B
Do Amore Diamonds
27-494F196A1 · Oct 29
£7,680 GBP
$10,290 USD
View
13 more retailers have this diamond
Prices start from £1,401 GBPSave up to £6,279 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
£1,401 GBP