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Round|Lab Grown|IGI

1.00ct E FL Round Lab Grown Diamond

ID • E/FL • IGI LG840634995

Shape and cutting style on the report: Round brilliant

Certificate IGI LG840634995

Diamond specifications and retailer prices

From £162 GBP
$217 USD
As of October 29, 2026
Save £1,186 GBP (88%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: £1,348 GBP at Helzberg Diamonds · As of October 30, 2026
View at Helzberg Diamonds

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG840634995 or 840634995. Listed at 21 retailers as of October 29, 2026, with prices from £162 to £1,348, a £1,186 spread on the same certified stone. Helzberg Diamonds lists it at £1,348. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.00
Carat
E
Colour
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634995
Dimensions6.39 × 6.44 × 3.92 mm
L/W Ratio1.01
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
6.39 mm6.44 mm1.00 ctE / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634995
Side View
Table 60.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.1%

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 29
Current: £1,348 GBP|Low: £162 GBP|High: £1,348 GBP|Avg: £510 GBP
Helzberg Diamonds
Retailer 2
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Retailer 21
October 31, 2026
Retailer 6£162 GBP
Retailer 3£181 GBP
Retailer 20£188 GBP
Retailer 11£201 GBP
Retailer 18£201 GBP
Retailer 15£325 GBP
Retailer 16£339 GBP
Retailer 4£345 GBP
Retailer 17£345 GBP
Retailer 7£350 GBP
Retailer 2£372 GBP
Retailer 10£375 GBP
Retailer 9£546 GBP
Retailer 12£646 GBP
Retailer 5£649 GBP
Retailer 8£686 GBP
Retailer 21£694 GBP
Retailer 14£739 GBP
Retailer 19£807 GBP
Retailer 13£925 GBP
Helzberg Diamonds£1,348 GBP

13 data points across 21 retailers

21 retailers£162 GBP to £1,348 GBP

A
Cheapest Retailer
-
£162 GBP
$217 USD
A
Retailer 2
-
£181 GBP
$243 USD
View
Final sale: no returns
A
Retailer 3
-
£188 GBP
$252 USD
View
A
Retailer 4
-
£201 GBP
$269 USD
View
A
Retailer 5
-
£201 GBP
$269 USD
View
A
Retailer 6
-
£325 GBP
View
A
Retailer 7
-
£339 GBP
€433 EUR
View
A
Retailer 8
-
£345 GBP
$462 USD
View
A
Retailer 9
-
£345 GBP
ZAR 7,477 ZAR
View
A
Retailer 10
-
£350 GBP
$469 USD
View
A
Retailer 11
-
£372 GBP
View
A
Retailer 12
-
£375 GBP
$503 USD
View
B+
Retailer 13
-
£546 GBP
SGD 989 SGD
View
B+
Retailer 14
-
£646 GBP
$866 USD
View
B+
Retailer 15
-
£649 GBP
$869 USD
View
B+
Retailer 16
-
£686 GBP
$919 USD
View
B+
Retailer 17
-
£694 GBP
$930 USD
View
B
Retailer 18
-
£739 GBP
$990 USD
View
B
Retailer 19
-
£807 GBP
View
B
Retailer 20
-
£925 GBP
$1,240 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJKPPL · Oct 30
£1,348 GBP
$1,806 USD
View
20 more retailers have this diamond
Prices start from £162 GBPSave up to £1,186 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 Round
£162 GBP