How To Create Glass Effect Icon in  adobe illustrator

Create rectangle box  with round corner

Apply blure effect with radious 20 Px

Create glass effect gradient with storke

Stroke 1 Px

place glass effect rectangle box and create  clipping mask

Create half portion of first rectangle box  and clipping mask

Join both  clipping mask elements and place second rectangle box on first elements

Create these two simple icon and place on top

Join  all elements  and  create this icon