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Heart|Lab Grown|IGI

0.99ct D IF Heart Lab Grown Diamond

ID • D/IF • IGI LG594338252

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG594338252

Diamond specifications and retailer prices

From £188 GBP
As of November 4, 2026
Save £967 GBP (84%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,156 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 0.99ct lab-grown heart diamond

This 0.99ct lab-grown heart sits in the just-under-one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG594338252 or 594338252. Listed at 21 retailers as of November 4, 2026, with prices from £188 to £1,156, a £967 spread on the same certified stone. Brilliant Earth lists it at £1,156. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.99
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle38.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG594338252
Dimensions6.06 × 7.09 × 4.00 mm
L/W Ratio1.17
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
6.06 mm7.09 mm0.99 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG594338252
Side View
Table 57.0%Crown 37.3°Girdle: MED-STKPavilion 38.2°Culet: NoneDepth 56.4%

Caratlytics Score

How it works →
A+
Exceptional
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: Nov 4
Current: £439 GBP|Low: £188 GBP|High: £1,048 GBP|Avg: £545 GBP|+1.7%
Retailer 1
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Retailer 19
November 5, 2026
Retailer 9£188 GBP
Retailer 5£210 GBP
Retailer 19£219 GBP
Retailer 7£234 GBP
Retailer 18£234 GBP
Retailer 12£285 GBP
Retailer 2£315 GBP
Retailer 10£413 GBP
Retailer 15£424 GBP
Retailer 1£439 GBP
Retailer 4£472 GBP
Retailer 14£586 GBP
Retailer 13£718 GBP
Retailer 6£751 GBP
Retailer 11£789 GBP
Retailer 8£820 GBP
Retailer 16£936 GBP
Retailer 17£937 GBP
Retailer 3£1,013 GBP

31 data points across 19 retailers

21 retailers£188 GBP to £1,156 GBP

A+
Cheapest Retailer
-
£188 GBP
A
Retailer 2
-
£210 GBP
View
Final sale: no returns
A
Retailer 3
-
£219 GBP
View
Retailer 4
-
£234 GBP
View
Price last confirmed 11 days ago
A
Retailer 5
-
£234 GBP
View
A
Retailer 6
-
£285 GBP
View
A
Retailer 7
-
£315 GBP
View
A
Retailer 8
-
£413 GBP
View
A
Retailer 9
-
£424 GBP
View
A
Retailer 10
-
£439 GBP
View
A
Retailer 11
-
£472 GBP
View
A
Retailer 12
-
£586 GBP
View
B+
Retailer 13
-
£605 GBP
View
B+
Retailer 14
-
£718 GBP
View
B+
Retailer 15
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£751 GBP
View
B+
Retailer 16
-
£789 GBP
View
B+
Retailer 17
-
£820 GBP
View
B+
Retailer 18
-
£936 GBP
View
B+
Retailer 19
-
£937 GBP
View
B+
Retailer 20
-
£1,013 GBP
View
Most Expensive
B
Brilliant Earth
8481318A · Nov 4
£1,156 GBP
$1,560 USD
View
20 more retailers have this diamond
Prices start from £188 GBPSave up to £967 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+
0.99ct Heart
£188 GBP