cockscomb pyrite

例句：

1. 1. The ancient city of Machu Picchu is famous for its unique cockscomb pyrite formations.
   马丘比丘古城以其独特的孔雀石形成而闻名。
2. 2. The pyrite ore was mined from the nearby mountains and sold as a valuable gemstone.
   这种孔雀石矿石是从附近的山中开采出来的，被作为珍贵的宝石出售。
3. 3. Pyrite is often used in jewelry making due to its beautiful color and hardness.
   由于其美丽的颜色和硬度，孔雀石常用于珠宝制作。