Obsidian is quickly becoming one of my favorite stones. It can be used for protection, absorbing and shielding one from negativity, but also has a mirror quality. This volcanic glass can act as a self-reflection, offering insights and truths into what may need to be changed in your life. This quality of revealing the hidden makes it a unique choice for use in your meditation practice.
I, personally, have a deep love of the black, protective stones. I wear my black tourmaline and obsidian bracelets almost every day. Recently, black spinel has been moving up the ranks and moving into my jewelry box.
Whatever your black stone preferences, obsidian is definitely worth a try.