CaratHunter
Plans
Cushion|Lab Grown|IGI

3.10ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG780663587

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

Certificate IGI LG780663587

Diamond specifications and retailer prices

From £1,634 GBP
$2,190 USD
As of October 30, 2026
Save £5,321 GBP (77%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £6,956 GBP at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

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 very-good cut grade and certified by IGI LG780663587 or 780663587. Listed at 13 retailers as of October 29, 2026, with prices from £1,634 to £6,956, a £5,321 spread on the same certified stone. Brilliant Earth lists it at £6,956. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.10
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780663587
Dimensions8.59 × 8.54 × 5.54 mm
L/W Ratio1.01
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
8.59 mm8.54 mm3.10 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780663587
Side View
Table 59.0%Crown 36.7°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 64.9%

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 30
Current: £6,956 GBP|Low: £1,634 GBP|High: £9,835 GBP|Avg: £4,440 GBP|-29.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 7£1,634 GBP
Retailer 6£1,827 GBP
Retailer 10£2,063 GBP
Retailer 2£2,262 GBP
Retailer 4£2,576 GBP
Retailer 12£2,637 GBP
Retailer 11£3,820 GBP
Retailer 8£4,015 GBP
Retailer 3£4,469 GBP
Retailer 5£4,814 GBP
Retailer 13£4,905 GBP
Retailer 9£5,762 GBP
Brilliant Earth£6,956 GBP

38 data points across 13 retailers

13 retailers£1,634 GBP to £6,956 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
Most Expensive
B
Brilliant Earth
20870143Y · Oct 29
£6,956 GBP
$9,320 USD
View
12 more retailers have this diamond
Prices start from £1,634 GBPSave up to £5,321 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