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Heart|Lab Grown|IGI

3.90ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG784645685

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG784645685

Diamond specifications and retailer prices

From £2,215 GBP
$2,968 USD
As of October 30, 2026
Save £13,070 GBP (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £15,285 GBP at Do Amore Diamonds · As of October 30, 2026
View at Do Amore Diamonds

About this 3.9ct lab-grown heart diamond

This 3.9ct lab-grown heart 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 LG784645685 or 784645685. Listed at 13 retailers as of October 30, 2026, with prices from £2,215 to £15,285, a £13,070 spread on the same certified stone. Do Amore Diamonds lists it at £15,285. 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

3.90
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle39.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG784645685
Dimensions9.89 × 10.57 × 6.43 mm
L/W Ratio1.07
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
9.89 mm10.57 mm3.90 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG784645685
Side View
Table 56.0%Crown 35.8°Girdle: STK-VTKPavilion 39.5°Culet: NoneDepth 60.8%

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 30
Current: £15,285 GBP|Low: £2,215 GBP|High: £17,233 GBP|Avg: £5,587 GBP|-11.3%
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
October 30, 2026
Retailer 7£2,215 GBP
Retailer 3£2,417 GBP
Retailer 11£2,520 GBP
Retailer 13£2,698 GBP
Retailer 4£2,928 GBP
Retailer 5£2,945 GBP
Retailer 14£3,556 GBP
Retailer 12£3,703 GBP
Retailer 10£4,006 GBP
Retailer 8£4,848 GBP
Retailer 6£5,651 GBP
Retailer 9£7,250 GBP
Retailer 2£9,799 GBP
Do Amore Diamonds£15,285 GBP

30 data points across 14 retailers

13 retailers£2,215 GBP to £15,285 GBP

A
Cheapest Retailer
-
£2,215 GBP
$2,968 USD
A
Retailer 2
-
£2,417 GBP
$3,239 USD
View
A
Retailer 3
-
£2,520 GBP
$3,376 USD
View
A
Retailer 4
-
£2,698 GBP
$3,615 USD
View
A
Retailer 5
-
£2,928 GBP
$3,923 USD
View
A
Retailer 6
-
£2,945 GBP
$3,946 USD
View
Final sale: no returns
A
Retailer 7
-
£3,556 GBP
$4,764 USD
View
B+
Retailer 8
-
£3,703 GBP
$4,962 USD
View
B+
Retailer 9
-
£4,006 GBP
$5,368 USD
View
B+
Retailer 10
-
£4,848 GBP
€6,186 EUR
View
B
Retailer 11
-
£7,250 GBP
View
B
Retailer 12
-
£9,799 GBP
$13,130 USD
View
Most Expensive
B
Do Amore Diamonds
27-448375942 · Oct 30
£15,285 GBP
$20,480 USD
View
12 more retailers have this diamond
Prices start from £2,215 GBPSave up to £13,070 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
3.90ct Heart
£2,215 GBP