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Heart|Lab Grown|IGI

3.51ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG792676493

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG792676493

Diamond specifications and retailer prices

From £3,128 GBP
$4,191 USD
As of October 29, 2026
Save £9,425 GBP (75%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £12,553 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.51ct lab-grown heart diamond

This 3.51ct 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 LG792676493 or 792676493. Listed at 15 retailers as of October 29, 2026, with prices from £3,128 to £12,553, a £9,425 spread on the same certified stone. Brilliant Earth lists it at £12,553. 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

3.51
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG792676493
Dimensions9.55 × 10.55 × 6.07 mm
L/W Ratio1.10
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
9.55 mm10.55 mm3.51 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG792676493
Side View
Table 63.0%Crown 34.9°Girdle: THN-STKPavilion 41.3°Culet: NoneDepth 57.5%

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 29
Current: £12,553 GBP|Low: £3,128 GBP|High: £12,949 GBP|Avg: £6,830 GBP|-3.1%
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
October 29, 2026
Retailer 4£3,128 GBP
Retailer 13£3,295 GBP
Retailer 3£3,384 GBP
Retailer 10£3,879 GBP
Retailer 12£3,929 GBP
Retailer 7£4,315 GBP
Retailer 11£4,851 GBP
Retailer 8£5,349 GBP
Retailer 9£7,096 GBP
Retailer 2£7,650 GBP
Retailer 14£7,935 GBP
Retailer 6£11,656 GBP
Retailer 5£12,051 GBP
Brilliant Earth£12,553 GBP

41 data points across 14 retailers

15 retailers£3,128 GBP to £12,553 GBP

A
Cheapest Retailer
-
£3,128 GBP
$4,191 USD
Retailer 2
-
£3,295 GBP
$4,415 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
£3,384 GBP
$4,534 USD
View
B+
Retailer 4
-
£3,879 GBP
HK$40,600 HKD
View
B+
Retailer 5
-
£3,929 GBP
$5,265 USD
View
B+
Retailer 6
-
£4,315 GBP
View
B+
Retailer 7
-
£4,851 GBP
$6,500 USD
View
B+
Retailer 8
-
£5,349 GBP
€6,826 EUR
View
B+
Retailer 9
-
£7,096 GBP
View
B+
Retailer 10
-
£7,650 GBP
ZAR 165,588 ZAR
View
B+
Retailer 11
-
£7,935 GBP
$10,632 USD
View
B
Retailer 12
-
£8,307 GBP
$11,130 USD
View
B
Retailer 13
-
£11,656 GBP
$15,618 USD
View
B
Retailer 14
-
£12,297 GBP
$16,477 USD
View
Most Expensive
B
Brilliant Earth
19356652A · Oct 30
£12,553 GBP
$16,820 USD
View
14 more retailers have this diamond
Prices start from £3,128 GBPSave up to £9,425 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
3.51ct Heart
£3,128 GBP