In the meantime, I decided to craft a terrarium necklace...simple, yet "green" enough to satisfy.
I used small bottles obtained from Hobby Lobby (the Tim Holtz Idea*ology set @ $5.99 less 40%), and filled them with chartreuse reindeer moss.
I had some silvertone chain in my jewelry-making supplies, and a hammered necklace clasp made in one of the classes I've taught at the library. Easy-peasy. Now to roll some little eggs out of robin's egg blue Fimo clay...a little colorful addition to the terrarium.