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Round|Lab Grown|IGI

1.00ct E SI1 Round Lab Grown Diamond

ID • E/SI1 • IGI LG763629218

Shape and cutting style on the report: Round brilliant

Certificate IGI LG763629218

Diamond specifications and retailer prices

From £118 GBP
$158 USD
As of October 29, 2026
Save £731 GBP (86%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £849 GBP at Helzberg Diamonds · As of October 29, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG763629218 or 763629218. Listed at 22 retailers as of October 29, 2026, with prices from £118 to £849, a £731 spread on the same certified stone. Helzberg Diamonds lists it at £849. 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 angle33°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG763629218
Dimensions6.43 × 6.39 × 3.98 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.43 mm6.39 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG763629218
Side View
Table 57.0%Crown 33°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £849 GBP|Low: £112 GBP|High: £849 GBP|Avg: £350 GBP
Helzberg Diamonds
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
Retailer 15
Retailer 16
October 30, 2026
Retailer 7£118 GBP
Retailer 9£132 GBP
Retailer 5£146 GBP
Retailer 16£146 GBP
Retailer 10£256 GBP
Retailer 3£265 GBP
Retailer 12£284 GBP
Retailer 2£285 GBP
Retailer 15£327 GBP
Retailer 14£358 GBP
Retailer 13£398 GBP
Retailer 8£469 GBP
Retailer 6£510 GBP
Retailer 11£686 GBP
Retailer 4£790 GBP
Helzberg Diamonds£849 GBP

43 data points across 16 retailers

22 retailers£118 GBP to £849 GBP

A
Cheapest Retailer
-
£118 GBP
$158 USD
A
Retailer 2
-
£132 GBP
$177 USD
View
Final sale: no returns
A
Retailer 3
-
£137 GBP
$183 USD
View
A
Retailer 4
-
£146 GBP
$195 USD
View
A
Retailer 5
-
£146 GBP
$195 USD
View
A
Retailer 6
-
£204 GBP
$274 USD
View
B+
Retailer 7
-
£256 GBP
View
B+
Retailer 8
-
£265 GBP
$355 USD
View
B+
Retailer 9
-
£284 GBP
€363 EUR
View
B+
Retailer 10
-
£285 GBP
View
Retailer 11
-
£302 GBP
$405 USD
View
Price last confirmed 88 days ago
B+
Retailer 12
-
£327 GBP
$438 USD
View
Retailer 13
-
£343 GBP
$460 USD
View
Price last confirmed 14 days ago
B+
Retailer 14
-
£358 GBP
A$738 AUD
View
B
Retailer 15
-
£398 GBP
$533 USD
View
Retailer 16
-
£465 GBP
$623 USD
View
Price last confirmed 39 days ago
B
Retailer 17
-
£469 GBP
$628 USD
View
Retailer 18
-
£496 GBP
$664 USD
View
Price last confirmed 14 days ago
B
Retailer 19
-
£510 GBP
$683 USD
View
B
Retailer 20
-
£686 GBP
View
B
Retailer 21
-
£790 GBP
$1,058 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZNMJMIPIHO · Oct 29
£849 GBP
$1,138 USD
View
21 more retailers have this diamond
Prices start from £118 GBPSave up to £731 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
£118 GBP