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Heart|Lab Grown|IGI

1.91ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG840632387

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840632387

Diamond specifications and retailer prices

From £610 GBP
$818 USD
As of October 30, 2026
Save £2,778 GBP (82%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £3,388 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.91ct lab-grown heart diamond

This 1.91ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840632387 or 840632387. Listed at 20 retailers as of October 30, 2026, with prices from £610 to £3,388, a £2,778 spread on the same certified stone. Brilliant Earth lists it at £3,388. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.91
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.2°
Pavilion angle39.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840632387
Dimensions7.46 × 8.58 × 5.11 mm
L/W Ratio1.15
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
7.46 mm8.58 mm1.91 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840632387
Side View
Table 58.0%Crown 37.2°Girdle: STK-THKPavilion 39.2°Culet: NoneDepth 59.6%

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: £3,388 GBP|Low: £610 GBP|High: £4,575 GBP|Avg: £1,661 GBP|-25.9%
Brilliant Earth
Retailer 2
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Retailer 4
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Retailer 12
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Retailer 20
October 30, 2026
Retailer 6£610 GBP
Retailer 3£664 GBP
Retailer 16£708 GBP
Retailer 9£736 GBP
Retailer 11£787 GBP
Retailer 13£803 GBP
Retailer 17£840 GBP
Retailer 5£894 GBP
Retailer 14£1,087 GBP
Retailer 7£1,140 GBP
Retailer 20£1,284 GBP
Retailer 15£1,302 GBP
Retailer 8£1,628 GBP
Retailer 18£1,991 GBP
Retailer 2£2,329 GBP
Retailer 4£2,451 GBP
Retailer 19£2,658 GBP
Retailer 12£2,804 GBP
Retailer 10£3,011 GBP
Brilliant Earth£3,388 GBP

21 data points across 20 retailers

20 retailers£610 GBP to £3,388 GBP

A
Cheapest Retailer
-
£610 GBP
$818 USD
A
Retailer 2
-
£664 GBP
$890 USD
View
A
Retailer 3
-
£708 GBP
$949 USD
View
Retailer 4
-
£736 GBP
$986 USD
View
Price last confirmed 14 days ago
A
Retailer 5
-
£787 GBP
$1,055 USD
View
Final sale: no returns
A
Retailer 6
-
£803 GBP
View
A
Retailer 7
-
£840 GBP
$1,125 USD
View
A
Retailer 8
-
£894 GBP
$1,198 USD
View
A
Retailer 9
-
£1,087 GBP
View
B+
Retailer 10
-
£1,140 GBP
$1,528 USD
View
B+
Retailer 11
-
£1,284 GBP
$1,720 USD
View
B+
Retailer 12
-
£1,302 GBP
ZAR 28,174 ZAR
View
B+
Retailer 13
-
£1,628 GBP
$2,181 USD
View
B+
Retailer 14
-
£1,991 GBP
$2,668 USD
View
B
Retailer 15
-
£2,329 GBP
$3,121 USD
View
B
Retailer 16
-
£2,451 GBP
$3,284 USD
View
B
Retailer 17
-
£2,658 GBP
View
B
Retailer 18
-
£2,804 GBP
SGD 5,077 SGD
View
B
Retailer 19
-
£3,011 GBP
$4,034 USD
View
Most Expensive
B
Brilliant Earth
21738367A · Oct 30
£3,388 GBP
$4,540 USD
View
19 more retailers have this diamond
Prices start from £610 GBPSave up to £2,778 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
1.91ct Heart
£610 GBP