picrinite

例句：

1. 1. The mineral was found in the riverbed, indicating that it is a picrinite deposit.
   这种矿物在河床上被发现，表明它是一矿床。
2. 2.The pyrite ore is mined from the area and used for industrial purposes.
   这种黄铁矿矿石从该地区开采出来，用于工业用途。
3. 3. Malachite is often used as a decorative stone due to its beautiful blue color.
   由于其美丽的蓝色，玛瑙常被用作装饰性石材。