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Heart|Lab Grown|IGI

1.00ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG843684291

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG843684291

Diamond specifications and retailer prices

From £112 GBP
$149 USD
As of October 27, 2026
Save £539 GBP (83%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £651 GBP at MOH London · As of October 29, 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 E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG843684291 or 843684291. Listed at 12 retailers as of October 27, 2026, with prices from £112 to £651, a £539 spread on the same certified stone. MOH London lists it at £651. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.00
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG843684291
Dimensions6.21 × 7.01 × 4.01 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.21 mm7.01 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG843684291
Side View
Table 62.0%Crown 32°Girdle: MED-THKPavilion 39.1°Culet: NoneDepth 57.2%

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: Oct 27
Current: £651 GBP|Low: £112 GBP|High: £685 GBP|Avg: £299 GBP|-4.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 29, 2026
Retailer 7£112 GBP
Retailer 6£130 GBP
Retailer 11£139 GBP
Retailer 4£146 GBP
Retailer 2£181 GBP
Retailer 9£216 GBP
Retailer 3£255 GBP
Retailer 5£263 GBP
Retailer 8£378 GBP
Retailer 12£445 GBP
Retailer 10£471 GBP
MOH London£651 GBP

14 data points across 12 retailers

12 retailers£112 GBP to £651 GBP

A
Cheapest Retailer
-
£112 GBP
$149 USD
A
Retailer 2
-
£130 GBP
$173 USD
View
A
Retailer 3
-
£139 GBP
$185 USD
View
A
Retailer 4
-
£146 GBP
$194 USD
View
A
Retailer 5
-
£181 GBP
View
B+
Retailer 6
-
£216 GBP
$288 USD
View
B+
Retailer 7
-
£255 GBP
$339 USD
View
B+
Retailer 8
-
£263 GBP
View
B
Retailer 9
-
£378 GBP
$503 USD
View
B
Retailer 10
-
£445 GBP
$593 USD
View
B
Retailer 11
-
£471 GBP
$627 USD
View
Most Expensive
B
MOH London
LG843684291 · Oct 29
£651 GBP
View
11 more retailers have this diamond
Prices start from £112 GBPSave up to £539 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
£112 GBP