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Heart|Lab Grown|IGI

1.20ct E IF Heart Lab Grown Diamond

ID • E/IF • IGI LG834614894

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG834614894

Diamond specifications and retailer prices

From £228 GBP
$306 USD
As of October 30, 2026
Save £1,496 GBP (87%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,724 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 1.2ct lab-grown heart diamond

This 1.2ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG834614894 or 834614894. Listed at 20 retailers as of October 30, 2026, with prices from £228 to £1,724, a £1,496 spread on the same certified stone. Brilliant Earth lists it at £1,724. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.20
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.5°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG834614894
Dimensions6.38 × 7.38 × 4.35 mm
L/W Ratio1.16
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
6.38 mm7.38 mm1.20 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG834614894
Side View
Table 65.0%Crown 39.5°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 58.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £1,724 GBP|Low: £213 GBP|High: £1,724 GBP|Avg: £630 GBP
Brilliant Earth
Retailer 2
Retailer 3
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Retailer 20
October 30, 2026
Retailer 2£228 GBP
Retailer 8£257 GBP
Retailer 9£275 GBP
Retailer 20£284 GBP
Retailer 17£301 GBP
Retailer 14£313 GBP
Retailer 6£392 GBP
Retailer 13£462 GBP
Retailer 5£472 GBP
Retailer 18£503 GBP
Retailer 11£516 GBP
Retailer 12£590 GBP
Retailer 4£671 GBP
Retailer 7£845 GBP
Retailer 10£884 GBP
Retailer 16£913 GBP
Retailer 19£946 GBP
Retailer 3£1,108 GBP
Retailer 15£1,144 GBP
Brilliant Earth£1,724 GBP

29 data points across 20 retailers

20 retailers£228 GBP to £1,724 GBP

A
Cheapest Retailer
-
£228 GBP
$306 USD
A
Retailer 2
-
£257 GBP
$345 USD
View
A
Retailer 3
-
£275 GBP
$368 USD
View
A
Retailer 4
-
£284 GBP
$380 USD
View
A
Retailer 5
-
£301 GBP
View
A
Retailer 6
-
£313 GBP
$420 USD
View
Final sale: no returns
A
Retailer 7
-
£392 GBP
$525 USD
View
A
Retailer 8
-
£462 GBP
$619 USD
View
A
Retailer 9
-
£472 GBP
ZAR 10,227 ZAR
View
A
Retailer 10
-
£503 GBP
View
B+
Retailer 11
-
£516 GBP
$691 USD
View
B+
Retailer 12
-
£590 GBP
$791 USD
View
B+
Retailer 13
-
£671 GBP
A$1,383 AUD
View
B
Retailer 14
-
£845 GBP
$1,132 USD
View
B+
Retailer 15
-
£884 GBP
$1,184 USD
View
B
Retailer 16
-
£913 GBP
A$1,881 AUD
View
B+
Retailer 17
-
£946 GBP
$1,268 USD
View
B
Retailer 18
-
£1,108 GBP
View
B
Retailer 19
-
£1,144 GBP
$1,533 USD
View
Most Expensive
B
Brilliant Earth
21696587A · Oct 30
£1,724 GBP
$2,310 USD
View
19 more retailers have this diamond
Prices start from £228 GBPSave up to £1,496 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
1.20ct Heart
£228 GBP