This diy is so simple, it hardly warrants a post. Though I had long figured a good way to hack a marble tray would be to use a marble tile and find a border. I had tried many different forms for this border, from a picture frame spray painted silver to using sheet metal.
However, at last I stumbled upon what I think was the best solution of all: staplers. It may sound a little bit crazy, but you honestly don't even realize that part of the marble tray is comprised of a common office product unless you're looking for it.
Anyway, all together this project not only came together in under 15 minutes, but also cost less than $15, which is the best kind of craft for a Monday afternoon. I hope you like it as much as I do!
DIY MARBLE TRAY:
Marble tile (mine was around 8"x 12"inches. This example is similar though slightly narrower)
Cushion for the tile (I used old Command velcro wall strips)
Car wax (optional)
Clean the marble tile, and use car wax to polish and make it glossy if desired;
Add cushions to the bottom of the tile. This is again optional, but I feel it makes it more practical. I used old velcro Command strips, so something of that thickness works well.
The staples fit so well over the Command strips that I honestly didn't even need to use glue. However, I added some just in case. I used simple Elmer's glue on the bottom edge of the staples, since I worried a hot glue gun would add bulk.