Calcium oxalate is the most common type of crystal to form this way, and accounts for about 80% of kidney stones.

草酸钙是最常见的以这种方式形成的晶体类型，约占肾结石的 80%。

The things we consider gemstones are often made up of minerals arranged into different types of crystals, although a few are made up of molecules that are arranged totally randomly.

我们所认为的宝石通常是由矿物排列而成的不同类型的晶体，尽管有一些宝石是由无规律的分子排列组成的。