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Heart|Lab Grown|IGI

3.55ct F FL Heart Lab Grown Diamond

ID • F/FL • IGI LG840634502

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840634502

Diamond specifications and retailer prices

From £2,140 GBP
$2,868 USD
As of November 2, 2026
Save £8,706 GBP (80%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £10,846 GBP at With Clarity · As of November 2, 2026
View at With Clarity

About this 3.55ct lab-grown heart diamond

This 3.55ct lab-grown heart sits in the three to five carat band, graded F colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840634502 or 840634502. Listed at 19 retailers as of November 2, 2026, with prices from £2,140 to £10,846, a £8,706 spread on the same certified stone. With Clarity lists it at £10,846. 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
F
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.7°
Pavilion angle40.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634502
Dimensions9.36 × 10.20 × 6.22 mm
L/W Ratio1.09
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
9.36 mm10.20 mm3.55 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634502
Side View
Table 60.0%Crown 36.7°Girdle: STK-THKPavilion 40.2°Culet: NoneDepth 61.0%

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: Nov 2
Current: £2,732 GBP|Low: £2,140 GBP|High: £10,846 GBP|Avg: £4,589 GBP|-0.6%
Retailer 1
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
Retailer 16
Retailer 17
Retailer 18
With Clarity
November 2, 2026
Retailer 10£2,140 GBP
Retailer 2£2,329 GBP
Retailer 7£2,482 GBP
Retailer 17£2,492 GBP
Retailer 3£2,601 GBP
Retailer 1£2,732 GBP
Retailer 9£2,838 GBP
Retailer 4£2,851 GBP
Retailer 14£3,179 GBP
Retailer 11£3,355 GBP
Retailer 6£3,412 GBP
Retailer 18£3,861 GBP
Retailer 13£4,684 GBP
Retailer 16£5,765 GBP
Retailer 12£6,293 GBP
Retailer 15£6,454 GBP
Retailer 8£8,650 GBP
Retailer 5£9,901 GBP
With Clarity£10,846 GBP

15 data points across 19 retailers

19 retailers£2,140 GBP to £10,846 GBP

A
Cheapest Retailer
-
£2,140 GBP
$2,868 USD
A
Retailer 2
-
£2,329 GBP
$3,120 USD
View
A
Retailer 3
-
£2,482 GBP
$3,326 USD
View
A
Retailer 4
-
£2,492 GBP
$3,339 USD
View
A
Retailer 5
-
£2,601 GBP
$3,485 USD
View
A
Retailer 6
-
£2,732 GBP
View
A
Retailer 7
-
£2,838 GBP
$3,802 USD
View
Final sale: no returns
A
Retailer 8
-
£2,851 GBP
$3,820 USD
View
B+
Retailer 9
-
£3,179 GBP
$4,260 USD
View
B+
Retailer 10
-
£3,355 GBP
View
B+
Retailer 11
-
£3,412 GBP
$4,572 USD
View
B+
Retailer 12
-
£3,861 GBP
$5,173 USD
View
B+
Retailer 13
-
£4,684 GBP
€5,977 EUR
View
B+
Retailer 14
-
£5,765 GBP
ZAR 124,793 ZAR
View
B+
Retailer 15
-
£6,293 GBP
View
B+
Retailer 16
-
£6,454 GBP
$8,648 USD
View
B
Retailer 17
-
£8,650 GBP
$11,590 USD
View
B
Retailer 18
-
£9,901 GBP
SGD 17,928 SGD
View
Most Expensive
B
With Clarity
840634502 · Nov 2
£10,846 GBP
$14,533 USD
View
18 more retailers have this diamond
Prices start from £2,140 GBPSave up to £8,706 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 Heart
£2,140 GBP