bówùguǎn / de / shuōmíngpái / jièshào / le / zǐshíyīng / de / jīngtǐ / jiégòu / hé / xíngchéng / huánjìng博物馆的说明牌介绍了紫石英的晶体结构和形成环境。The museum's information plaque describes the crystal structure and formation environment of amethyst.