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Cushion|Lab Grown|IGI

3.10ct D FL Cushion Lab Grown Diamond

ID • D/FL • IGI LG768629404

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG768629404

Diamond specifications and retailer prices

From £1,634 GBP
$2,190 USD
As of October 30, 2026
Save £5,721 GBP (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £7,355 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 3.1ct lab-grown cushion diamond

This 3.1ct lab-grown cushion sits in the three to five carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG768629404 or 768629404. Listed at 14 retailers as of October 30, 2026, with prices from £1,634 to £7,355, a £5,721 spread on the same certified stone. Blue Nile lists it at £7,355. 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
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG768629404
Dimensions9.91 × 7.86 × 5.11 mm
L/W Ratio1.26
Girdle conditionFaceted
Culet sizePointed
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
9.91 mm7.86 mm3.10 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG768629404
Side View
Table 59.0%Crown 34.7°Girdle: MED-STKPavilion 35.4°Culet: NoneDepth 65.0%

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 30
Current: £7,355 GBP|Low: £1,634 GBP|High: £16,343 GBP|Avg: £5,003 GBP|-55.0%
Blue Nile
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
October 31, 2026
Retailer 8£1,634 GBP
Retailer 7£1,827 GBP
Retailer 11£2,063 GBP
Retailer 2£2,262 GBP
Retailer 4£2,576 GBP
Retailer 13£2,637 GBP
Retailer 12£3,820 GBP
Retailer 9£4,015 GBP
Retailer 3£4,469 GBP
Retailer 6£4,814 GBP
Retailer 14£4,905 GBP
Retailer 10£5,762 GBP
Retailer 5£6,956 GBP
Blue Nile£7,355 GBP

34 data points across 14 retailers

14 retailers£1,634 GBP to £7,355 GBP

A
Cheapest Retailer
-
£1,634 GBP
$2,190 USD
A
Retailer 2
-
£1,827 GBP
$2,448 USD
View
A
Retailer 3
-
£2,063 GBP
HK$21,600 HKD
View
A
Retailer 4
-
£2,262 GBP
View
A
Retailer 5
-
£2,576 GBP
$3,452 USD
View
A
Retailer 6
-
£2,637 GBP
€3,365 EUR
View
B+
Retailer 7
-
£3,820 GBP
ZAR 82,691 ZAR
View
B+
Retailer 8
-
£4,015 GBP
$5,380 USD
View
B+
Retailer 9
-
£4,469 GBP
$5,988 USD
View
Retailer 10
-
£4,814 GBP
$6,450 USD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
£4,905 GBP
View
B+
Retailer 12
-
£5,762 GBP
$7,720 USD
View
B
Retailer 13
-
£6,956 GBP
$9,320 USD
View
Most Expensive
B
Blue Nile
29314197 · Oct 31
£7,355 GBP
$9,855 USD
View
13 more retailers have this diamond
Prices start from £1,634 GBPSave up to £5,721 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
3.10ct Cushion
£1,634 GBP