Hi, I am a lapidary and been a rockhound for a longtime. The obsidian
you purchased is referred to as “Midnight Lace Obsidian”. It’s
usually slabbed up to make display pieces with a back light to show
the contrast. Sometimes it gives an almost shadow effect like or
parallax found in very good fortification agates. If you cut it
thin, obsidian is glass. In order for the design to show thru your
doing to have to have an open back. Maybe building up the back would
be good to protect it. Not good bracelet material, buckle material or
ring though. It scratches easy and chips. I dont use it in my
lapidary work or my jewelry for that reason. I also have a thing for
expensive agates =)
So the pros; it works easy, is soft, polishes great with Tin oxide.
Looks nice - lots of folks like it. Cons; the scratches, the chips,
fractures, having to cut it thin and then the danger of it being thin
from breaking etc, if mounted must have an open back, but must also be
well protected from any use the wearer might subject it to.
I have a pendant and the first time I wore it it scratched. It had a
very high dome and when I leaned over i scratched it with out even
knowing. So make it os they wear high on the neckline as well for
pendants. Feel free to email me offlist with any questions you might
still have about the rock if you have any.