a mineral in the form of crystals (= regular shapes) from which the chemical element zirconium is obtained

A tiny crystal of zircon found in northwestern Australia is estimated to be about 4.3 billion years old. 在澳大利亚西北部发现的一颗锆石小晶体据估计是在43亿年前形成的。

Zircons, made primarily of the elements zirconium, oxygen and silicon, are extremely hard and durable. 锆石主要由锆、氧和硅等元素组成，非常坚硬耐磨。