I love the dense and glassy look of obsidian and it is magnificent for creating dramatic jewellery. In a recent necklace (see below) unusual triangles of obsidian have been set against contrasting shining sterling silver. See the whole piece HERE
There are other versions of obsidian of course, such as snowflake or mahogany obsidian but I'll do those another time!
Metaphysically, Obsidian has strong properties. It exposes flaws, weaknesses and blockages and nothing can hide from its power! It is helpful for highly sensitive people and it can provide deep soul healing. Very effective for soaking up negative energies it stimulates growth on all levels and opens new horizons. For healing it gives insight into the cause of illness, aids digestion and detoxifies. Specifically, black obsidian is a creative stone, protective and supportive during change. Often used by experienced practictioners during meditation and scrying, it is matched with clear quartz to help ground and articulate what is revealed. If held briefly above the third eye (brow) it breaks through mental barriers.