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Heart|Lab Grown|IGI

1.00ct E IF Heart Lab Grown Diamond

VG • E/IF • IGI LG842658717

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG842658717

Diamond specifications and retailer prices

From £243 GBP
$326 USD
As of October 30, 2026
Save £1,008 GBP (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,251 GBP at Queensmith · As of October 27, 2026
View at Queensmith

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG842658717 or 842658717. Listed at 17 retailers as of October 27, 2026, with prices from £243 to £1,251, a £1,008 spread on the same certified stone. Queensmith lists it at £1,251. 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
E
Colour
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.4°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG842658717
Dimensions5.95 × 6.60 × 4.16 mm
L/W Ratio1.11
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.95 mm6.60 mm1.00 ctE / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG842658717
Side View
Table 65.0%Crown 35.4°Girdle: STK-THKPavilion 41.9°Culet: NoneDepth 63.0%

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 30
Current: £1,251 GBP|Low: £243 GBP|High: £1,251 GBP|Avg: £630 GBP
Queensmith
Retailer 2
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Retailer 17
October 30, 2026
Retailer 5£243 GBP
Retailer 10£287 GBP
Retailer 2£364 GBP
Retailer 17£388 GBP
Retailer 8£436 GBP
Retailer 13£437 GBP
Retailer 15£465 GBP
Retailer 11£479 GBP
Retailer 6£575 GBP
Retailer 14£660 GBP
Retailer 7£723 GBP
Retailer 12£795 GBP
Retailer 16£831 GBP
Retailer 9£905 GBP
Retailer 3£1,085 GBP
Retailer 4£1,110 GBP
Queensmith£1,251 GBP

14 data points across 17 retailers

17 retailers£243 GBP to £1,251 GBP

A
Cheapest Retailer
-
£243 GBP
$326 USD
Final sale: no returns
A
Retailer 2
-
£287 GBP
View
B+
Retailer 3
-
£364 GBP
$488 USD
View
B+
Retailer 4
-
£388 GBP
$520 USD
View
B+
Retailer 5
-
£436 GBP
$584 USD
View
B+
Retailer 6
-
£437 GBP
€558 EUR
View
B+
Retailer 7
-
£465 GBP
ZAR 10,058 ZAR
View
B+
Retailer 8
-
£479 GBP
View
B+
Retailer 9
-
£575 GBP
$770 USD
View
B
Retailer 10
-
£660 GBP
A$1,360 AUD
View
B
Retailer 11
-
£723 GBP
SGD 1,310 SGD
View
B
Retailer 12
-
£795 GBP
A$1,639 AUD
View
B
Retailer 13
-
£831 GBP
$1,113 USD
View
B
Retailer 14
-
£905 GBP
$1,213 USD
View
B
Retailer 15
-
£1,085 GBP
View
B
Retailer 16
-
£1,110 GBP
$1,488 USD
View
Most Expensive
B
Queensmith
LG842658717 · Oct 27
£1,251 GBP
View
16 more retailers have this diamond
Prices start from £243 GBPSave up to £1,008 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
£243 GBP