I display my jewelry on "trees" I made for a show. I used glass candle holders and vases filled with sand and decorative pebbles (seashells if you like), stuck a few twiggy branches into it and ta-da! Earthy, economical, and pretty display all in one.
To get earrings to stay on the branches without getting all tangled in each other, carefully use a pocket knife and make wide slits or smoothed areas into the branches at intervals.
I also bound multiple branches with hemp and stabilized them in the sad and rocks to create a multi-branch effect. Helps to keep them from falling over.
Kendra