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Heart|Lab Grown|IGI

1.04ct D IF Heart Lab Grown Diamond

EX • D/IF • IGI LG591351353

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG591351353

Diamond specifications and retailer prices

From £275 GBP
$368 USD
As of October 30, 2026
Save £958 GBP (78%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £1,858 GBP at Brilliant Earth · As of October 9, 2026
View at Brilliant Earth

About this 1.04ct lab-grown heart diamond

This 1.04ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG591351353 or 591351353. Listed at 20 retailers as of October 26, 2026, with a 349% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.04
Carat
D
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle38.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG591351353
Dimensions6.24 × 7.04 × 4.07 mm
L/W Ratio1.13
Girdle conditionFaceted
Culet sizePointed
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
6.24 mm7.04 mm1.04 ctD / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG591351353
Side View
Table 62.0%Crown 33.5°Girdle: STK-THKPavilion 38.5°Culet: NoneDepth 57.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: £1,858 GBP|Low: £237 GBP|High: £1,858 GBP|Avg: £588 GBP
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
Retailer 16
Retailer 17
October 31, 2026
Retailer 9£237 GBP
Retailer 4£275 GBP
Retailer 7£307 GBP
Retailer 8£307 GBP
Retailer 12£310 GBP
Retailer 17£405 GBP
Retailer 10£407 GBP
Retailer 3£463 GBP
Retailer 14£478 GBP
Retailer 16£516 GBP
Retailer 2£537 GBP
Retailer 15£730 GBP
Retailer 11£881 GBP
Retailer 5£999 GBP
Retailer 13£1,083 GBP
Retailer 6£1,232 GBP
Brilliant Earth£1,858 GBP

42 data points across 17 retailers

20 retailers£275 GBP to £1,232 GBP

Retailer 1
-
£237 GBP
$318 USD
Price last confirmed 29 days ago
A
Retailer 2
-
£275 GBP
$368 USD
View
Final sale: no returns
Retailer 3
-
£287 GBP
$385 USD
View
Price last confirmed 32 days ago
Retailer 4
-
£307 GBP
$411 USD
View
Price last confirmed 28 days ago
A
Retailer 5
-
£307 GBP
$411 USD
View
A
Retailer 6
-
£310 GBP
View
A
Retailer 7
-
£405 GBP
$542 USD
View
A
Retailer 8
-
£407 GBP
$545 USD
View
B+
Retailer 9
-
£463 GBP
$620 USD
View
B+
Retailer 10
-
£478 GBP
$641 USD
View
B+
Retailer 11
-
£516 GBP
ZAR 11,178 ZAR
View
B+
Retailer 12
-
£537 GBP
View
B+
Retailer 13
-
£730 GBP
A$1,505 AUD
View
B
Retailer 14
-
£881 GBP
$1,181 USD
View
Retailer 15
-
£987 GBP
$1,322 USD
View
Price last confirmed 30 days ago
B
Retailer 16
-
£999 GBP
$1,339 USD
View
B
Retailer 17
-
£1,083 GBP
$1,451 USD
View
Retailer 18
-
£1,094 GBP
A$2,255 AUD
View
Price last confirmed 156 days ago
B
Retailer 19
-
£1,232 GBP
View
Most Expensive
Brilliant Earth
11242224A · Oct 9
£1,858 GBP
$2,490 USD
View
Price last confirmed 22 days ago
19 more retailers have this diamond
Prices start from £275 GBPSave up to £958 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
1.04ct Heart
£275 GBP