Is Chiastolite a Rock?
Chiastolite Is a Rare Rock, Found in Only Four Places in the World, One of Which Is Central Massachusetts, Where the Vein Has the Most Clarity. .. . Cross...
Chiastolite is a rare rock, found in only four places in the world, one of which is Central Massachusetts, where the vein has the most clarity. ... Cross stones are found in the George Hill area of Lancaster, Sterling, Clinton and Boylston.
Is Chiastolite a mineral?
Chiastolite is a variety of the mineral andalusite with the chemical composition Al2SiO5. It is noted for distinctive cross-shaped black inclusions of graphite. The presence of the cross caused this mineral be used as a gem.
How is Chiastolite formed?
Chiastolite is a variety of andalusite that contains black particles of graphite arranged in geometric patterns. The graphite is pushed aside by crystal growth within a rock that is being metamorphosed. As growth occurs, the particles become concentrated at crystal interfaces.
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
