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Heart|Lab Grown|IGI

1.00ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG818657599

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818657599

Diamond specifications and retailer prices

From £281 GBP
$377 USD
As of November 3, 2026
Save £967 GBP (77%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,248 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG818657599 or 818657599. Listed at 18 retailers as of November 1, 2026, with prices from £281 to £1,248, a £967 spread on the same certified stone. MOH London lists it at £1,248. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
D
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.9°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818657599
Dimensions6.28 × 6.85 × 3.93 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
6.28 mm6.85 mm1.00 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818657599
Side View
Table 56.0%Crown 36.9°Girdle: MED-THKPavilion 37.2°Culet: NoneDepth 57.4%

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: Nov 3
Current: £1,248 GBP|Low: £281 GBP|High: £1,483 GBP|Avg: £736 GBP|-13.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 3, 2026
Retailer 3£281 GBP
Retailer 5£370 GBP
Retailer 8£425 GBP
Retailer 10£438 GBP
Retailer 12£438 GBP
Retailer 7£503 GBP
Retailer 6£537 GBP
Retailer 2£558 GBP
Retailer 13£707 GBP
Retailer 9£765 GBP
Retailer 4£1,034 GBP
Retailer 11£1,216 GBP
MOH London£1,248 GBP

37 data points across 13 retailers

18 retailers£281 GBP to £1,248 GBP

A
Cheapest Retailer
-
£281 GBP
$377 USD
Final sale: no returns
Retailer 2
-
£298 GBP
$400 USD
View
Price last confirmed 26 days ago
Retailer 3
-
£339 GBP
$454 USD
View
Price last confirmed 35 days ago
Retailer 4
-
£365 GBP
$490 USD
View
Price last confirmed 39 days ago
Retailer 5
-
£370 GBP
$496 USD
View
Price last confirmed 34 days ago
Retailer 6
-
£370 GBP
$496 USD
View
Price last confirmed 22 days ago
A
Retailer 7
-
£425 GBP
$570 USD
View
B+
Retailer 8
-
£438 GBP
$588 USD
View
B+
Retailer 9
-
£438 GBP
$588 USD
View
B+
Retailer 10
-
£503 GBP
€643 EUR
View
B+
Retailer 11
-
£537 GBP
ZAR 11,637 ZAR
View
B+
Retailer 12
-
£558 GBP
View
B+
Retailer 13
-
£707 GBP
$948 USD
View
B+
Retailer 14
-
£765 GBP
$1,026 USD
View
B
Retailer 15
-
£1,034 GBP
$1,386 USD
View
Retailer 16
-
£1,189 GBP
$1,595 USD
View
Price last confirmed 29 days ago
B
Retailer 17
-
£1,216 GBP
$1,630 USD
View
Most Expensive
B
MOH London
LG818657599 · Nov 1
£1,248 GBP
View
17 more retailers have this diamond
Prices start from £281 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
1.00ct Heart
£281 GBP