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Heart|Lab Grown|IGI

4.51ct E FL Heart Lab Grown Diamond

ID • E/FL • IGI LG794623406

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG794623406

Diamond specifications and retailer prices

From £3,342 GBP
$4,478 USD
As of October 30, 2026
Save £19,652 GBP (85%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £22,994 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 4.51ct lab-grown heart diamond

This 4.51ct lab-grown heart sits in the three to five carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG794623406 or 794623406. Listed at 9 retailers as of October 29, 2026, with prices from £3,342 to £22,994, a £19,652 spread on the same certified stone. Do Amore Diamonds lists it at £22,994. 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

4.51
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle37.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG794623406
Dimensions11.84 × 9.95 × 6.57 mm
L/W Ratio1.19
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
11.84 mm9.95 mm4.51 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG794623406
Side View
Table 59.0%Crown 35.3°Girdle: STK-THKPavilion 37.3°Culet: NoneDepth 55.5%

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: £22,994 GBP|Low: £3,342 GBP|High: £29,756 GBP|Avg: £12,080 GBP|-22.7%
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
October 30, 2026
Retailer 12£3,342 GBP
Retailer 10£3,503 GBP
Retailer 9£4,998 GBP
Retailer 7£5,000 GBP
Retailer 8£5,080 GBP
Retailer 11£5,997 GBP
Retailer 6£8,754 GBP
Retailer 4£9,890 GBP
Retailer 2£10,829 GBP
Retailer 13£12,479 GBP
Retailer 3£17,437 GBP
Do Amore Diamonds£22,994 GBP
Retailer 5£29,092 GBP

21 data points across 13 retailers

9 retailers£3,342 GBP to £22,994 GBP

A
Cheapest Retailer
-
£3,342 GBP
$4,478 USD
A
Retailer 2
-
£3,503 GBP
$4,693 USD
View
A
Retailer 3
-
£4,998 GBP
$6,697 USD
View
A
Retailer 4
-
£5,000 GBP
$6,700 USD
View
A
Retailer 5
-
£5,080 GBP
$6,807 USD
View
A
Retailer 6
-
£5,997 GBP
$8,035 USD
View
B+
Retailer 7
-
£8,754 GBP
View
B+
Retailer 8
-
£10,829 GBP
$14,510 USD
View
Most Expensive
B
Do Amore Diamonds
27-84D286800 · Oct 29
£22,994 GBP
$30,810 USD
View
8 more retailers have this diamond
Prices start from £3,342 GBPSave up to £19,652 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
4.51ct Heart
£3,342 GBP