Natural specimen, illustrative.
Zoisite · Mohs 6–7
Tanzanite
Blue-violet zoisite known for directional colour. Cleavage and sensitivity to temperature change call for careful wear.
- Composition
- Ca2Al3(SiO4)3(OH)
- Hardness
- 6–7 on the Mohs scale · scratch resistance, not toughness
- Birthstone
- December
- Care
- Clean gently with a soft cloth and mild soapy water; rinse briefly and dry. Avoid heat, chemicals, ultrasonic cleaning and hard impacts. Ask about treatments before cleaning.
- Symbolic
- Reflection · Third eye chakra. Design vocabulary, not a physical effect.
Pairs well with
Stones that share its meaning.
Amethyst
Quartz · Mohs 7
Calm · Evening ritual · Reflection
Moonstone
Feldspar · Mohs 6–6.5
Evening ritual · Reflection
Sapphire
Corundum · Mohs 9
Expression · Reflection
Rock crystal
Quartz · Mohs 7
ReflectionGem properties describe materials. Chakra and intention pairings are symbolic traditions and Mulu design choices, not measured energy or medical effects. Stones are not proven to treat disease or improve sleep.