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Heart|Lab Grown|IGI

1.89ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG830620146

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG830620146

Diamond specifications and retailer prices

From £628 GBP
$841 USD
As of October 30, 2026
Save £2,798 GBP (82%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £3,426 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.89ct lab-grown heart diamond

This 1.89ct 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 LG830620146 or 830620146. Listed at 15 retailers as of October 30, 2026, with prices from £628 to £3,426, a £2,798 spread on the same certified stone. Brilliant Earth lists it at £3,426. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.89
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle36.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620146
Dimensions7.86 × 8.81 × 4.76 mm
L/W Ratio1.12
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
7.86 mm8.81 mm1.89 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620146
Side View
Table 62.0%Crown 35.8°Girdle: MED-STKPavilion 36.7°Culet: NoneDepth 54.0%

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: £3,426 GBP|Low: £628 GBP|High: £4,530 GBP|Avg: £1,657 GBP|-24.4%
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
Retailer 15
October 31, 2026
Retailer 11£628 GBP
Retailer 3£728 GBP
Retailer 5£779 GBP
Retailer 12£825 GBP
Retailer 4£858 GBP
Retailer 9£912 GBP
Retailer 2£1,119 GBP
Retailer 10£1,172 GBP
Retailer 15£1,268 GBP
Retailer 8£1,674 GBP
Retailer 7£2,398 GBP
Retailer 14£2,523 GBP
Retailer 6£2,774 GBP
Retailer 13£2,979 GBP
Brilliant Earth£3,426 GBP

3 data points across 15 retailers

15 retailers£628 GBP to £3,426 GBP

A
Cheapest Retailer
-
£628 GBP
$841 USD
A
Retailer 2
-
£728 GBP
$976 USD
View
A
Retailer 3
-
£779 GBP
$1,044 USD
View
Final sale: no returns
A
Retailer 4
-
£825 GBP
View
A
Retailer 5
-
£858 GBP
$1,150 USD
View
A
Retailer 6
-
£912 GBP
$1,222 USD
View
B+
Retailer 7
-
£1,119 GBP
View
B+
Retailer 8
-
£1,172 GBP
$1,571 USD
View
B+
Retailer 9
-
£1,268 GBP
$1,699 USD
View
B+
Retailer 10
-
£1,674 GBP
$2,243 USD
View
B
Retailer 11
-
£2,398 GBP
$3,213 USD
View
B
Retailer 12
-
£2,523 GBP
$3,381 USD
View
B
Retailer 13
-
£2,774 GBP
SGD 5,022 SGD
View
B
Retailer 14
-
£2,979 GBP
$3,992 USD
View
Most Expensive
B
Brilliant Earth
22348973A · Oct 30
£3,426 GBP
$4,590 USD
View
14 more retailers have this diamond
Prices start from £628 GBPSave up to £2,798 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
1.89ct Heart
£628 GBP