If you can accept something which is a plausible ring, but not an exact copy and you can use Illustrator, then you can get the result in a minute:
The shape in the left (=a circle + a rectangle, united in the pathfinder panel) has got 3D effect Revolve. See the effect dialog. The shading can be adjusted by playing with the lights. I inserted 2 extra lights to get enough highlights.
The small parts at 12 a'clock can also be created as revolutions. There's another ring and a sphere.
The parts can be copied and pasted to Photoshop in high res for fine tuning. Often contrast must be added because Illustrator easily makes too dark shading.
grey circle
,blue inner circle with gradient
,hightlights and shadows on the grey border
... etc. Then you get multiple easy to google questions, rather than "how to make this thing". Like "how to make a circle". I mean honestly there might even be a tutorial for this exact icon, but the point is you can pretty much figure out anything if you first break it down. Also, it's better to ask those questions here because I think this could be like a ~1hour video tutorial...