phengites

2 English words descend from Latin phengites, most common first.

fengiteA transparent form of marble or alabaster, formerly sometimes used for windows.
phengiteAny of a series of dioctahedral micas of composition K(AlMg)₂(OH)₂(SiAl)₄O₁₀, similar to muscovite but with addition of magnesium.

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