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Round|Lab Grown|IGI

1.00ct H SI1 Round Lab Grown Diamond

ID • H/SI1 • IGI LG780656982

Shape and cutting style on the report: Round brilliant

Certificate IGI LG780656982

Diamond specifications and retailer prices

From £358 GBP
$480 USD
As of October 29, 2026
1 retailer carries this diamond
Only listing: £358 GBP at Brilliant Earth
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Brilliant Earth

About this 1ct lab-grown round diamond

This 1ct lab-grown round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG780656982 or 780656982. Listed at a single retailer as of October 29, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
H
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG780656982
Dimensions6.40 × 6.45 × 3.94 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
6.40 mm6.45 mm1.00 ctH / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG780656982
Side View
Table 59.0%Crown 33.2°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.3%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 29
Current: £196 GBP|Low: £196 GBP|High: £422 GBP|Avg: £302 GBP|-10.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
April 15, 2026
Retailer 1£196 GBP
Retailer 3£203 GBP
Retailer 2£252 GBP
Retailer 4£335 GBP
Retailer 5£395 GBP
Retailer 6£422 GBP

4 data points across 6 retailers

1 retailer

B+
Brilliant Earth
18496590A · Oct 29
£358 GBP
$480 USD
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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.

B+
1.00ct Round
£358 GBP