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Round|Lab Grown|IGI

1.05ct E IF Round Lab Grown Diamond

ID • E/IF • IGI LG734531337

Shape and cutting style on the report: Round brilliant

Certificate IGI LG734531337

Diamond specifications and retailer prices

From £143 GBP
$191 USD
As of October 29, 2026
Save £1,072 GBP (88%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £1,216 GBP at Helzberg Diamonds · As of October 29, 2026
View at Helzberg Diamonds

About this 1.05ct lab-grown round diamond

This 1.05ct lab-grown round sits in the classic one-carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG734531337 or 734531337. Listed at 23 retailers as of October 29, 2026, with prices from £143 to £1,216, a £1,072 spread on the same certified stone. Helzberg Diamonds lists it at £1,216. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.05
Carat
E
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG734531337
Dimensions6.52 × 6.50 × 4.02 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
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
6.52 mm6.50 mm1.05 ctE / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG734531337
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.7°Culet: NoneDepth 61.7%

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: £1,216 GBP|Low: £139 GBP|High: £1,216 GBP|Avg: £457 GBP
Helzberg Diamonds
Retailer 2
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October 30, 2026
Retailer 13£143 GBP
Retailer 12£160 GBP
Retailer 23£166 GBP
Retailer 4£177 GBP
Retailer 14£177 GBP
Retailer 16£240 GBP
Retailer 8£288 GBP
Retailer 18£300 GBP
Retailer 20£305 GBP
Retailer 2£322 GBP
Retailer 7£374 GBP
Retailer 6£390 GBP
Retailer 9£414 GBP
Retailer 22£433 GBP
Retailer 3£452 GBP
Retailer 21£570 GBP
Retailer 19£591 GBP
Retailer 11£611 GBP
Retailer 5£785 GBP
Retailer 17£834 GBP
Retailer 15£874 GBP
Retailer 10£1,014 GBP
Helzberg Diamonds£1,216 GBP

25 data points across 23 retailers

23 retailers£143 GBP to £1,216 GBP

A
Cheapest Retailer
-
£143 GBP
$191 USD
A
Retailer 2
-
£160 GBP
$213 USD
View
Final sale: no returns
A
Retailer 3
-
£166 GBP
$221 USD
View
A
Retailer 4
-
£177 GBP
$236 USD
View
A
Retailer 5
-
£177 GBP
$236 USD
View
A
Retailer 6
-
£240 GBP
$320 USD
View
Retailer 7
-
£288 GBP
View
Price last confirmed 13 days ago
A
Retailer 8
-
£300 GBP
€381 EUR
View
A
Retailer 9
-
£305 GBP
ZAR 6,553 ZAR
View
A
Retailer 10
-
£322 GBP
View
A
Retailer 11
-
£374 GBP
$498 USD
View
A
Retailer 12
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£390 GBP
A$798 AUD
View
B+
Retailer 13
-
£414 GBP
$551 USD
View
A
Retailer 14
-
£433 GBP
A$887 AUD
View
B+
Retailer 15
-
£452 GBP
$602 USD
View
B+
Retailer 16
-
£570 GBP
$759 USD
View
B+
Retailer 17
-
£591 GBP
A$1,210 AUD
View
B+
Retailer 18
-
£611 GBP
$813 USD
View
Retailer 19
-
£785 GBP
$1,045 USD
View
Price last confirmed 8 days ago
B+
Retailer 20
-
£834 GBP
View
B
Retailer 21
-
£874 GBP
$1,163 USD
View
Retailer 22
-
£1,014 GBP
$1,350 USD
View
Price last confirmed 13 days ago
Most Expensive
B
Helzberg Diamonds
ZXZOJMMHLNMO · Oct 29
£1,216 GBP
$1,619 USD
View
22 more retailers have this diamond
Prices start from £143 GBPSave up to £1,072 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
1.05ct Round
£143 GBP