pyrochroite

例句：

1. 1. The pyrochroite in the necklace is a rare gemstone.
   项链中的红宝石是一种罕见的宝石。
2. 2. The pyrochroite was discovered in the mines of Brazil.
   这种红宝石是在巴西的矿中发现的。
3. 3. The pyrochroite has been used for centuries as a symbol of wealth and power.
   这种红宝石自古以来就被用作财富和权力的象征。