To make icons you'll need:
This is a tutorial is on how to make the glass bubble style icons. There are probably better/easier ways to do it, but I'm no expert. This is the way I've done it.
1st start a new picture in Photoshop, 96x96 transparent background.
Select the Gradient Fill Tool & set it to Foreground to Background. Select your foreground colour as the darker one & your background colour as the lighter one. Then drag the cursor from top to bottom & fill.
Double click on your circle layer to select the Layer Style. Tick the Drop Shadow box & enter 3 on the Distance box & 2 in the Size box.
Then tick the Inner Glow box, make the colour the same as the darker colour of you circle [mine's black] & set the Blend Mode to Multiply & it should be looking something like the pic below (unless you've chosen different colours).
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