Danburite - CaB₂Si₂O₇O

Habit: Colorless, white, amber, yellow, pink or yellow brown. Granular to glassy and prismatic; can easily be confused with topaz. Vitreous luster; transparent to translucent. White streak.

Environment: Occurs in moderate- to low-temperature conditions as a contact metamorphic mineral.

Etymology: From its type locality, Danbury, Connecticut.