alkaline tourmaline

例句：

1. 1. This alkaline tourmaline is said to have healing properties.
   据说这种碱性绿宝石具有治疗性质。
2. 2.The ancient Egyptians used alkaline tourmaline as a symbol of power and protection.
   古埃及人用碱性绿宝石作为权力和保护的象征。
3. 3. The alkaline tourmaline was found in the mines of South America, where it was mined for its unique color.
   这种碱性绿宝石在南美洲的矿中被发现，用于开采其独特的颜色。