石英钙长辉长岩的英文：
quartz-anorthitegabbro

This is a basic quartz analog clock.
这是一个普通指针式石英钟。

Amethyst is a type of quartz.
紫水晶是一种石英。

A variety of silica that contains microcrystalline quartz.
燧石含微小晶状的石英的各种硅石

A chiefly amphibole rock with minor plagioclase and little quartz.
角闪岩主要由角闪石、少量斜长石和石英组成的岩石

A purple or violet form of transparent quartz used as a gemstone.
紫水晶紫色或紫丁香色的透明石英，用作宝石