kyanite crystals in quartz - São José de Safira, Minas Gerais, Brazil - hand/display specimen Its crystals can grow as

Its crystals can grow as fine fibrils that are considered asbestiform

with crystal faces as they came from the mine and perfect terminations

If tiny rhombs would be useful in your classroom

Tuffs are light colored

Note that these have been affected by covid

kyanite crystals in quartz - São José de Safira, Minas Gerais, Brazil - hand/display specimen Its crystals can grow askyanite Al2SiO5 Kyanite forms when aluminum rich rocks are metamorphosed, and is frequently found in schists that formed at medium to high pressures and lower temperatures in areas of regional metamorphism. At higher temperatures, kyanite converts to sillimanite. Occasionally the metamorphism produces a pegmatite with large crystals that form when a fluid rich magma allows rapid movement of atoms. These large crystals of kyanite and the surrounding