Obsidian worry stone in velvet pouch 
Approx 20g 
Up to 4cm 
Origin: USA 
Obsidian is a volcanic glass found in areas where there has been a recent volcanic eruption. Obsidian forms when lava rich in silica cools rapidly, preventing the formation of crystals, resulting in a glassy texture. 
Metaphysical Obsidian is known for its protection qualities and ability to repel negative energies from your person making it a perfect crystal for school or workplaces where there may be negative energies. It’s a lovely stone to wear as jewellery or carry as a thumb stone due to its grounding, protective and trauma release properties.