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Heart|Lab Grown|IGI

1.00ct D IF Heart Lab Grown Diamond

VG • D/IF • IGI LG818661937

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818661937

Diamond specifications and retailer prices

From £184 GBP
As of November 5, 2026
Save £860 GBP (82%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,044 GBP at Brilliant Earth · As of November 4, 2026
View at Brilliant Earth

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG818661937 or 818661937. Listed at 19 retailers as of November 4, 2026, with prices from £184 to £1,044, a £860 spread on the same certified stone. Brilliant Earth lists it at £1,044. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.00
Carat
D
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.7°
Pavilion angle38.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818661937
Dimensions6.30 × 6.85 × 3.98 mm
L/W Ratio1.09
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
6.30 mm6.85 mm1.00 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818661937
Side View
Table 54.0%Crown 33.7°Girdle: STK-THKPavilion 38.1°Culet: NoneDepth 58.1%

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: Nov 5
Current: £1,044 GBP|Low: £184 GBP|High: £1,222 GBP|Avg: £536 GBP|-14.5%
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
November 5, 2026
Retailer 2£184 GBP
Retailer 9£210 GBP
Retailer 3£304 GBP
Retailer 13£359 GBP
Retailer 12£371 GBP
Retailer 7£378 GBP
Retailer 5£409 GBP
Retailer 6£469 GBP
Retailer 11£527 GBP
Retailer 14£561 GBP
Retailer 10£698 GBP
Retailer 8£819 GBP
Retailer 4£965 GBP
Brilliant Earth£1,044 GBP

31 data points across 14 retailers

19 retailers£184 GBP to £1,044 GBP

Retailer 1
-
£176 GBP
Price last confirmed 28 days ago
A
Retailer 2
-
£184 GBP
View
Final sale: no returns
Retailer 3
-
£206 GBP
View
Price last confirmed 37 days ago
A
Retailer 4
-
£210 GBP
View
Retailer 5
-
£218 GBP
View
Price last confirmed 36 days ago
Retailer 6
-
£218 GBP
View
Price last confirmed 24 days ago
A
Retailer 7
-
£304 GBP
View
A
Retailer 8
-
£359 GBP
View
A
Retailer 9
-
£371 GBP
View
A
Retailer 10
-
£378 GBP
View
B+
Retailer 11
-
£409 GBP
View
B+
Retailer 12
-
£469 GBP
View
B+
Retailer 13
-
£527 GBP
View
B+
Retailer 14
-
£561 GBP
View
B
Retailer 15
-
£698 GBP
View
Retailer 16
-
£701 GBP
View
Price last confirmed 31 days ago
B
Retailer 17
-
£819 GBP
View
B
Retailer 18
-
£965 GBP
View
Most Expensive
B
Brilliant Earth
21580600A · Nov 4
£1,044 GBP
$1,410 USD
View
18 more retailers have this diamond
Prices start from £184 GBPSave up to £860 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
1.00ct Heart
£184 GBP