Heart|Lab Grown|IGI

3.09ct D SI2 Heart Lab Grown Diamond

ID • D/SI2 • IGI LG685540444

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG685540444

Diamond specifications and retailer prices

From £284 GBP
$381 USD
As of October 30, 2026
Save £2,141 GBP (88%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,426 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 3.09ct lab-grown heart diamond

This 3.09ct lab-grown heart sits in the three to five carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685540444 or 685540444. Listed at 14 retailers as of October 30, 2026, with prices from £284 to £2,426, a £2,141 spread on the same certified stone. Brilliant Earth lists it at £2,426. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

3.09
Carat
D
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.6°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685540444
Dimensions9.89 × 8.87 × 5.99 mm
L/W Ratio1.11
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.89 mm8.87 mm3.09 ctD / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685540444
Side View
Table 59.0%Crown 37.6°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.6%

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: £2,426 GBP|Low: £284 GBP|High: £2,851 GBP|Avg: £841 GBP|-14.9%
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
October 30, 2026
Retailer 2£284 GBP
Retailer 3£335 GBP
Retailer 9£352 GBP
Retailer 4£371 GBP
Retailer 6£470 GBP
Retailer 7£637 GBP
Retailer 5£655 GBP
Retailer 12£887 GBP
Retailer 13£891 GBP
Retailer 8£1,024 GBP
Retailer 10£1,132 GBP
Retailer 11£1,452 GBP
Brilliant Earth£2,426 GBP

44 data points across 13 retailers

14 retailers£284 GBP to £2,426 GBP

A
Cheapest Retailer
-
£284 GBP
$381 USD
A
Retailer 2
-
£335 GBP
$449 USD
View
A
Retailer 3
-
£352 GBP
$472 USD
View
A
Retailer 4
-
£371 GBP
$497 USD
View
B+
Retailer 5
-
£470 GBP
$630 USD
View
A
Retailer 6
-
£637 GBP
View
A
Retailer 7
-
£655 GBP
$878 USD
View
Retailer 8
-
£816 GBP
$1,094 USD
View
Price last confirmed 20 days ago
B+
Retailer 9
-
£887 GBP
A$1,828 AUD
View
B+
Retailer 10
-
£891 GBP
$1,194 USD
View
B+
Retailer 11
-
£1,024 GBP
$1,372 USD
View
B+
Retailer 12
-
£1,132 GBP
$1,517 USD
View
B
Retailer 13
-
£1,452 GBP
View
Most Expensive
B
Brilliant Earth
13281496A · Oct 30
£2,426 GBP
$3,250 USD
View
13 more retailers have this diamond
Prices start from £284 GBPSave up to £2,141 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
3.09ct Heart
£284 GBP