名稱 葡萄石	Name Prehnite
化學公式 Ca2Al(AlSi3O10)(OH)2	Chemical Formula Ca2Al(AlSi3O10)(OH)2
莫氏硬度 6-6.5	Mohs Scale of Hardness 6-6.5
描述 它是無色至灰色至黃色，黃綠色或白色。其光澤為玻璃色至珍珠色。它的條紋是白色的。	Description It is colorless to gray to yellow, yellow-green or white. Its luster is vitreous to pearly. Its streak is white.
小挑戰 葡萄石主要來自哪裡？他們主要來自非洲，澳大利亞，加拿大，中國，德國，蘇格蘭，法國和美國。	Challenge Where does the prehnite mostly come from? They mostly come from Africa, Australia, Canada, China, Germany, Scotland, France and the United States.

Reference

http://geologylearn.blogspot.com/2017/01/prehnite.html

https://en.wikipedia.org/wiki/Prehnite

By 4B Hung Man Ting Florence on 15 April 2021