Ilvaite is a rare mineral of calcium-iron-bearing silicate.

黑柱石是一种少见的含钙铁硅酸盐矿物。

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In course of sinking the well-shaft they came upon a deposit of a very rare mineral.

他们在凿井的过程中，发现了一处稀有矿物矿床。

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Wuhan "rare mineral treasure" marketing is successful positioning, sales promotion, lock object.

武汉“稀世宝矿泉水”的营销特点就是成功定位、锁定销售对象、重点宣传。

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The Rex property also contains gold, silver and rare earths mineral potential.

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There is substantial upside potential in rare earth mineral stocks, and though a decisive bottom is not yet in place, risk-controlled entry points are evident for three leading producers.

FORBES: A New Trend for Rare Earth Stocks?

The most common source of thorium is the rare earth phosphate mineral, monazite.

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