How to achieve this metallic effect

[default9tpywek20uma]

Hi guys. Does anyone have any advice on how to achieve this effect? Have been asked to recreate the effect on a new logo.

Thank you in advance!

[Ton Frederiks]

You can do that with gradients:

https://helpx.adobe.com/illustrator/using/gradients.html

[Ton Frederiks]

Have a look at the Metals from the Swatches panel > Gradients:

[Monika Gause]

Difficult to see the edges. Those could be brushes.