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Radiant|Lab Grown|IGI

3.10ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG780666217

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG780666217

Diamond specifications and retailer prices

From £1,255 GBP
$1,681 USD
As of October 30, 2026
Save £7,604 GBP (86%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £8,859 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.1ct lab-grown radiant diamond

This 3.1ct lab-grown radiant 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 LG780666217 or 780666217. Listed at 15 retailers as of October 30, 2026, with prices from £1,255 to £8,859, a £7,604 spread on the same certified stone. Brilliant Earth lists it at £8,859. 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 angle41.9°
Pavilion angle33°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780666217
Dimensions10.18 × 7.26 × 4.73 mm
L/W Ratio1.40
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
10.18 mm7.26 mm3.10 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780666217
Side View
Table 61.0%Crown 41.9°Girdle: ThickPavilion 33°Culet: NoneDepth 65.2%

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: £8,859 GBP|Low: £1,255 GBP|High: £12,389 GBP|Avg: £3,912 GBP|-11.7%
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
Retailer 14
Retailer 15
October 31, 2026
Retailer 11£1,255 GBP
Retailer 5£1,368 GBP
Retailer 10£1,535 GBP
Retailer 8£1,582 GBP
Retailer 13£1,868 GBP
Retailer 7£2,121 GBP
Retailer 4£2,292 GBP
Retailer 9£2,509 GBP
Retailer 2£2,688 GBP
Retailer 3£3,011 GBP
Retailer 15£4,031 GBP
Retailer 14£4,612 GBP
Retailer 6£4,735 GBP
Retailer 12£8,635 GBP
Brilliant Earth£8,859 GBP

34 data points across 15 retailers

15 retailers£1,255 GBP to £8,859 GBP

A
Cheapest Retailer
-
£1,255 GBP
$1,681 USD
A
Retailer 2
-
£1,368 GBP
$1,833 USD
View
A
Retailer 3
-
£1,535 GBP
$2,057 USD
View
A
Retailer 4
-
£1,582 GBP
$2,120 USD
View
A
Retailer 5
-
£1,868 GBP
$2,503 USD
View
A
Retailer 6
-
£2,121 GBP
$2,842 USD
View
Final sale: no returns
A
Retailer 7
-
£2,292 GBP
$3,071 USD
View
A
Retailer 8
-
£2,509 GBP
$3,362 USD
View
B+
Retailer 9
-
£2,688 GBP
€3,430 EUR
View
B+
Retailer 10
-
£3,011 GBP
$4,034 USD
View
B+
Retailer 11
-
£4,031 GBP
$5,401 USD
View
B+
Retailer 12
-
£4,612 GBP
View
Retailer 13
-
£4,735 GBP
$6,345 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
£8,635 GBP
$11,570 USD
View
Most Expensive
B
Brilliant Earth
19065709Y · Oct 30
£8,859 GBP
$11,870 USD
View
14 more retailers have this diamond
Prices start from £1,255 GBPSave up to £7,604 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 Radiant
£1,255 GBP