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Heart|Lab Grown|IGI

1.00ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG816611180

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816611180

Diamond specifications and retailer prices

From £281 GBP
$377 USD
As of November 3, 2026
Save £1,449 GBP (84%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £1,730 GBP at Brilliant Earth · As of November 2, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG816611180 or 816611180. Listed at 18 retailers as of November 2, 2026, with prices from £281 to £1,730, a £1,449 spread on the same certified stone. Brilliant Earth lists it at £1,730. 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 angle34.5°
Pavilion angle38.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816611180
Dimensions6.77 × 6.19 × 3.96 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
6.77 mm6.19 mm1.00 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816611180
Side View
Table 59.0%Crown 34.5°Girdle: STK-VTKPavilion 38.8°Culet: NoneDepth 58.5%

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: £1,730 GBP|Low: £281 GBP|High: £1,961 GBP|Avg: £812 GBP|-11.8%
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
November 3, 2026
Retailer 4£281 GBP
Retailer 8£425 GBP
Retailer 11£438 GBP
Retailer 13£438 GBP
Retailer 7£503 GBP
Retailer 6£537 GBP
Retailer 2£558 GBP
Retailer 3£707 GBP
Retailer 9£765 GBP
Retailer 5£1,034 GBP
Retailer 12£1,216 GBP
Retailer 10£1,255 GBP
Brilliant Earth£1,730 GBP

35 data points across 13 retailers

18 retailers£281 GBP to £1,730 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
-
£334 GBP
$448 USD
View
Price last confirmed 35 days ago
Retailer 4
-
£370 GBP
$496 USD
View
Price last confirmed 31 days ago
Retailer 5
-
£370 GBP
$496 USD
View
Price last confirmed 22 days ago
A
Retailer 6
-
£425 GBP
$570 USD
View
B+
Retailer 7
-
£438 GBP
$588 USD
View
B+
Retailer 8
-
£438 GBP
$588 USD
View
B+
Retailer 9
-
£503 GBP
€643 EUR
View
B+
Retailer 10
-
£537 GBP
ZAR 11,637 ZAR
View
B+
Retailer 11
-
£558 GBP
View
Retailer 12
-
£707 GBP
$948 USD
View
Price last confirmed 7 days ago
B+
Retailer 13
-
£765 GBP
$1,026 USD
View
B
Retailer 14
-
£1,034 GBP
$1,386 USD
View
Retailer 15
-
£1,189 GBP
$1,595 USD
View
Price last confirmed 33 days ago
B
Retailer 16
-
£1,216 GBP
$1,630 USD
View
B
Retailer 17
-
£1,255 GBP
View
Most Expensive
B
Brilliant Earth
21018689A · Nov 2
£1,730 GBP
$2,320 USD
View
17 more retailers have this diamond
Prices start from £281 GBPSave up to £1,449 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