About
Obsidian is a natural volcanic glass formed when molten lava cools so rapidly that it does not have time to crystallise. Its smooth, glassy texture and deep black colour make it a distinctive and attractive material. Variants like snowflake obsidian, which contains white inclusions, and rainbow obsidian, with its iridescent sheen, add to its appeal. Obsidian has been used for thousands of years in tools, weapons, and jewellery due to its sharp edges and appearance.
Crystal Healing Energy
Black obsidian is all about protection and grounding, making it a go-to for anyone wanting to feel anchored and safe. Connected to the root chakra, it’s like your energetic shield against negativity, helping you stay grounded and centred.
Birthstones & Anniversaries
Obsidian is not a traditional birthstone but is associated with the zodiac sign Scorpio, symbolising protection, grounding, and transformation.
Volcanic glass
Obsidian forms from rapidly cooled lava, resulting in a natural glass without a crystal structure.
Science
- Mineral: Volcanic glass (not a true mineral)
- Crystal System: Amorphous
- Colour: Typically black, but also brown and multicoloured
- Refractive Index: 1.45 to 1.55
- Birefringence: None
- Specific Gravity: 2.3 to 2.6
- Mohs Hardness: 5 to 5.5
Treatments
Obsidian is typically untreated, as its natural glassy appearance is highly valued.
Imitations
Coloured glass can be used to imitate obsidian, especially black glass. However, glass imitations lack the volcanic origin and the distinctive natural qualities of real obsidian and variation in types.

































