CaratHunter
Plans
Heart|Lab Grown|IGI

1.00ct D FL Heart Lab Grown Diamond

GD • D/FL • IGI LG818671731

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG818671731

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)
19 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 standard cut grade and certified by IGI LG818671731 or 818671731. Listed at 19 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. 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
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle38.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818671731
Dimensions6.26 × 6.82 × 3.97 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
6.26 mm6.82 mm1.00 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818671731
Side View
Table 56.0%Crown 35.9°Girdle: STK-THKPavilion 38.4°Culet: NoneDepth 58.2%

Caratlytics Score

How it works →
A
Excellent
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 3
Current: £1,248 GBP|Low: £281 GBP|High: £1,489 GBP|Avg: £738 GBP|-15.1%
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
Retailer 14
November 3, 2026
Retailer 3£281 GBP
Retailer 6£377 GBP
Retailer 9£425 GBP
Retailer 11£438 GBP
Retailer 13£438 GBP
Retailer 8£503 GBP
Retailer 7£537 GBP
Retailer 2£558 GBP
Retailer 5£595 GBP
Retailer 14£707 GBP
Retailer 10£765 GBP
Retailer 4£1,034 GBP
Retailer 12£1,216 GBP
MOH London£1,248 GBP

37 data points across 14 retailers

19 retailers£281 GBP to £1,248 GBP

A
Cheapest Retailer
-
£281 GBP
$377 USD
Final sale: no returns
Retailer 2
-
£303 GBP
$406 USD
View
Price last confirmed 26 days ago
Retailer 3
-
£340 GBP
$456 USD
View
Price last confirmed 35 days ago
Retailer 4
-
£371 GBP
$498 USD
View
Price last confirmed 39 days ago
Retailer 5
-
£375 GBP
$503 USD
View
Price last confirmed 22 days ago
Retailer 6
-
£375 GBP
$503 USD
View
Price last confirmed 31 days ago
B+
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
Retailer 13
-
£595 GBP
HK$6,231 HKD
View
Price last confirmed 14 days ago
B
Retailer 14
-
£707 GBP
$948 USD
View
B
Retailer 15
-
£765 GBP
$1,026 USD
View
B
Retailer 16
-
£1,034 GBP
$1,386 USD
View
Retailer 17
-
£1,206 GBP
$1,617 USD
View
Price last confirmed 29 days ago
B
Retailer 18
-
£1,216 GBP
$1,630 USD
View
Most Expensive
B
MOH London
LG818671731 · Nov 1
£1,248 GBP
View
18 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