CaratHunter
Plans
Heart|Lab Grown|IGI

4.25ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG804660315

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG804660315

Diamond specifications and retailer prices

From £3,073 GBP
$4,117 USD
As of October 30, 2026
Save £18,153 GBP (86%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £21,226 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 4.25ct lab-grown heart diamond

This 4.25ct 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 LG804660315 or 804660315. Listed at 13 retailers as of October 29, 2026, with prices from £3,073 to £21,226, a £18,153 spread on the same certified stone. Do Amore Diamonds lists it at £21,226. 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

4.25
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle38.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG804660315
Dimensions10.24 × 10.80 × 6.37 mm
L/W Ratio1.05
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
10.24 mm10.80 mm4.25 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG804660315
Side View
Table 61.0%Crown 36.4°Girdle: STK-THKPavilion 38.6°Culet: NoneDepth 59.0%

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: Oct 30
Current: £21,226 GBP|Low: £3,073 GBP|High: £23,778 GBP|Avg: £7,934 GBP|-10.7%
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
Retailer 15
October 30, 2026
Retailer 8£3,073 GBP
Retailer 3£3,233 GBP
Retailer 12£3,329 GBP
Retailer 4£3,603 GBP
Retailer 15£3,616 GBP
Retailer 5£4,066 GBP
Retailer 13£4,657 GBP
Retailer 14£4,936 GBP
Retailer 11£5,541 GBP
Retailer 9£6,838 GBP
Retailer 6£7,761 GBP
Retailer 10£8,223 GBP
Retailer 2£11,762 GBP
Retailer 7£14,833 GBP
Do Amore Diamonds£21,226 GBP

30 data points across 15 retailers

13 retailers£3,073 GBP to £21,226 GBP

A
Cheapest Retailer
-
£3,073 GBP
$4,117 USD
A
Retailer 2
-
£3,233 GBP
$4,332 USD
View
A
Retailer 3
-
£3,329 GBP
$4,460 USD
View
A
Retailer 4
-
£3,603 GBP
$4,827 USD
View
A
Retailer 5
-
£3,616 GBP
$4,845 USD
View
A
Retailer 6
-
£4,066 GBP
$5,448 USD
View
Final sale: no returns
A
Retailer 7
-
£4,657 GBP
$6,240 USD
View
A
Retailer 8
-
£4,936 GBP
$6,614 USD
View
A
Retailer 9
-
£5,541 GBP
$7,424 USD
View
A
Retailer 10
-
£6,838 GBP
€8,726 EUR
View
B+
Retailer 11
-
£8,223 GBP
View
B+
Retailer 12
-
£11,762 GBP
$15,760 USD
View
Most Expensive
B
Do Amore Diamonds
27-FF0CCDED2 · Oct 29
£21,226 GBP
$28,440 USD
View
12 more retailers have this diamond
Prices start from £3,073 GBPSave up to £18,153 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
4.25ct Heart
£3,073 GBP