ML227 Staurolite

Mineral

Code: ML227

名稱   十字石Name   Staurolite
化學公式   Fe2Al9[SiO4]4O7(OH)2Chemical Formula   Fe2Al9[SiO4]4O7(OH)2
莫氏硬度   4.5Mohs scale of Hardness   4.5
描述   恆星石的顏色為棕黃色，棕黑色，黃棕色，深棕色，紅棕色。它的條紋是灰色的。恆星石的光澤是玻璃質和暗淡的。恆星石是亞貝殼狀的，是在脆性材料中形成的裂縫，其特徵是具有半彎曲的表面。Description   The color of Staurolite is Brownish yellow, Brownish black, Yellow brown, Dark brown, Reddish brown. The streak of it is gray. The luster of Staurolite is Vitreous and Dull. Staurolite is sub conchoidal, fractures developed in brittle materials characterized by semi-curving surfaces.
小挑戰   我們在哪裡可以找到這塊石頭？ 石材可以在美國北卡羅萊納州切羅基公司的大理石中找到。Challenge   Where can we find this stone? The stone can be found in Marble, Cherokee Co., North Carolina, USA

Reference

  1. http://webmineral.com/data/Staurolite.shtml#.YHsJYBQzbvU

By 4A 31 Woo Tsz Hin on 16th April, 2021