Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is produced when felsic lava extruded from a volcano cools rapidly without crystal growth. Pure obsidian is usually dark in appearance though the colour varies depending on the presence of impurities. Iron and magnesium typically give the obsidian a dark green to brown to black colour. Traces of obsidian being used as weapon/tools date as far back as 7,000 years ago. Obsidian was highly valued in the ancient world for arrowheads and blades.
An excellent grounding & protective stone. It forms a shield against negativity. It can help to draw out  mental stress & tension. Brings clarity & promotes qualities of compassion & strength.
Zodiac sign: Scorpio (Oct 23-Nov 21)
Sagittarius: (Nov 22-Dec 21)
Chakra: Root
Please Note: Natural gemstone or semi-precious stone comes from mineral. Due to the naturality, the stones may have a tiny flaw. Meanwhile, cutting or polishing also makes every piece of gemstone vary in colour and size. Image may look different (colour) due to many monitor or device resolutions.