Chalcedony

Chakra: Throat, Sacral, Solar Plexus
Element: Water
Known As: Stone of Peace
Planet: Moon
Rarity: Common
Resonant Number: 9
Zodiac: Cancer, Virgo, Sagittarius, Aquarius

Chemical Formula: SiO₂
Crystal Class: Silicates
Crystal System: Trigonal
Name: Chalcedony
Synonym: Ceracahtes, Chalcedone, Chalcedonite, Chalcedononyx, Merlinite

Cleavage: None
Common Colors: Varies
Diaphaneity: Translucent
Formula Mass: 60 g/mol
Fracture: Uneven, splintery, conchoidal
Luster: Waxy, vitreous, dull, greasy, silky
Mohs Hardness: 7
Optical Properties: Uniaxial (+)
Pleochroism: Non-pleochroic
Streak: White
Tenacity: Brittle