For your consideration is a very full amber stone tree of luck on a lava rock.  I believe the base rock is Rhyolite.  The tree is wound wire and this one has a lot of attached orange colored stones that are highly polished.  It is 8 1/2" tall and 6 1/2" wide x 3 1/2" wide.  You can adjust the wires to make it a little taller or wider by bending the wires more.  Very unique piece from others listed.