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Heart|Lab Grown|IGI

3.56ct D FL Heart Lab Grown Diamond

EX • D/FL • IGI LG826659203

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG826659203

Diamond specifications and retailer prices

From £2,976 GBP
$3,963 USD
As of October 30, 2026
Save £9,938 GBP (77%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £12,914 GBP at With Clarity · As of October 30, 2026
View at With Clarity

About this 3.56ct lab-grown heart diamond

This 3.56ct 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 LG826659203 or 826659203. Listed at 20 retailers as of October 30, 2026, with prices from £2,976 to £12,914, a £9,938 spread on the same certified stone. With Clarity lists it at £12,914. 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

3.56
Carat
D
Colour
FL
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG826659203
Dimensions9.52 × 10.84 × 6.18 mm
L/W Ratio1.14
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
9.52 mm10.84 mm3.56 ctD / FL
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG826659203
Side View
Table 59.0%Crown 33.3°Girdle: MED-STKPavilion 41°Culet: NoneDepth 57.0%

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 30
Current: £8,015 GBP|Low: £2,857 GBP|High: £12,914 GBP|Avg: £6,041 GBP|+1.9%
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
Retailer 19
With Clarity
October 29, 2026
Retailer 19£2,976 GBP
Retailer 7£3,119 GBP
Retailer 8£3,267 GBP
Retailer 9£3,333 GBP
Retailer 2£3,452 GBP
Retailer 4£3,452 GBP
Retailer 18£3,496 GBP
Retailer 5£3,516 GBP
Retailer 16£4,042 GBP
Retailer 13£4,075 GBP
Retailer 3£4,314 GBP
Retailer 12£4,531 GBP
Retailer 14£5,090 GBP
Retailer 17£7,434 GBP
Retailer 1£8,015 GBP
Retailer 15£8,332 GBP
Retailer 10£10,055 GBP
Retailer 6£11,788 GBP
Retailer 11£12,242 GBP
With Clarity£12,914 GBP

37 data points across 20 retailers

20 retailers£2,976 GBP to £12,914 GBP

A
Cheapest Retailer
-
£2,976 GBP
$3,963 USD
A
Retailer 2
-
£3,119 GBP
$4,153 USD
View
A
Retailer 3
-
£3,267 GBP
$4,350 USD
View
B+
Retailer 4
-
£3,333 GBP
$4,438 USD
View
Final sale: no returns
Retailer 5
-
£3,452 GBP
$4,597 USD
View
Price last confirmed 17 days ago
A
Retailer 6
-
£3,452 GBP
$4,597 USD
View
B+
Retailer 7
-
£3,496 GBP
$4,655 USD
View
A
Retailer 8
-
£3,516 GBP
$4,682 USD
View
B+
Retailer 9
-
£4,042 GBP
$5,383 USD
View
B+
Retailer 10
-
£4,075 GBP
HK$42,400 HKD
View
B+
Retailer 11
-
£4,314 GBP
$5,745 USD
View
B+
Retailer 12
-
£4,531 GBP
View
B+
Retailer 13
-
£5,090 GBP
$6,778 USD
View
B+
Retailer 14
-
£7,434 GBP
View
B+
Retailer 15
-
£8,015 GBP
ZAR 172,430 ZAR
View
B
Retailer 16
-
£8,332 GBP
$11,096 USD
View
B
Retailer 17
-
£10,055 GBP
$13,391 USD
View
B
Retailer 18
-
£11,788 GBP
SGD 21,214 SGD
View
B
Retailer 19
-
£12,242 GBP
$16,303 USD
View
Most Expensive
B
With Clarity
826659203 · Oct 30
£12,914 GBP
$17,197 USD
View
19 more retailers have this diamond
Prices start from £2,976 GBPSave up to £9,938 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
3.56ct Heart
£2,976 GBP