Do you know how to get this golden interval

To help me with the designs of the mock-up

Find the piece you selected in the picture

Do you need that golden shelf? If so it is easy to recreate, create a rectangle with a gradient in that colors to simulate gold and add a shadow under it.

Your words are difficult for the application and I see that it is mock up ready, so I want to get it or give me a way to apply it.

I’m grateful to you

You won’t find something that simple as a mock up on envato.

@DesignSomething has explained how to do it above

Otherwise look on graphicriver for “gold shelf” and there way be something suitable in amongst the results