Kyanite

蓝晶石

Al₂SiO₅

Kyanite is a silicate mineral of aluminum with composition Al₂SiO₅ . This sample is about 25x25 cm and is from Monte Campione, Uri, Switzerland. It is described as kyanite (the slender crystals) with staurolite (the background material). The chemical compostion is the same as the minerals sillimanite and andalusite. These samples are on display at the Smithsonian Museum of Natural History.

蓝晶石是一种含铝的硅酸盐矿物，其化学式为Al₂SiO₅。这块样品尺寸约为25×25厘米，采自瑞士乌里州的蒙特坎皮奥。该样品被描述为蓝晶石（细长的晶体）与石英石（背景材料）。其化学成分与矿物石英石和红柱石相同。这些样品陈列于史密森尼自然历史博物馆。

At left above is a kyanite sample from Monte Campione, Uri, Switzerland. It is about 15 x 25 cm. At right above are long slender blue crystals of kyanite on the order of 25 to 30 cm long. They are from Minas Gerais, Brazil.

上图左侧是一块来自瑞士 Uri 的 kyanite 样本，尺寸约为 15 厘米 x 25 厘米。上图右侧是来自巴西 Minas Gerais 的长而细的蓝色晶体，长度在 25 到 30 厘米之间。