名稱   葡萄石/符山石	Name   Prehnite/ Vesuvianite
化學公式   Ca2Al(AlSi3O10)(OH)2/ Ca10(Mg, Fe)2Al4(SiO4)5(Si2O7)2(OH,F)4	Chemical Formula   Ca2Al(AlSi3O10)(OH)2/ Ca10(Mg, Fe)2Al4(SiO4)5(Si2O7)2(OH,F)4
莫氏硬度   6 to 6.5或6 to 7	Mohs scale of Hardness   6 to 6.5 or 6 to 7
描述   光澤的範圍可能從玻璃到珍珠，通常看起來像是毛玻璃。就顏色而言，葡萄石中實際上有很多變化。葡萄石通常以綠色出現，但您也可以找到藍色，無色，粉紅色或白色的標本。	Description   The luster may range from vitreous to pearly, and often has a look like frosted glass. In terms of color, there is actually quite a bit of variation in prehnite. Prehnite typically occurs in green, but you can also find specimens which are blue, colorless, pink, or white.
小挑戰   在哪裡可以找到這塊石頭？一些最重要的礦床來自非洲（納米比亞，南非），澳大利亞（西澳大利亞州，北領地），加拿大，中國，德國，蘇格蘭，法國和美國（新澤西州，賓夕法尼亞州和弗吉尼亞州）。	Challenge   Where can this stone be found? Some of the most important deposits come from Africa (Namibia, South Africa), Australia (Western Australia, Northern Territory), Canada, China, Germany, Scotland, France and the United States (New Jersey, Pennsylvania and Virginia).

Reference

1. http://www.gemcoach.com/prehnite-guide/

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

by 4A Fok Yung Him 10 on 1 April 2021