Willemite

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This is a rare specimen of botryoidal willemite from Santa Eulalia - and not only that, it is a really BIG and rich one! The lustrous willemite itself is colorless, and it glistens like a good smithsonite - the color comes from inclusions of limonite, which serves as the matrix and formed as a crust over something else, giving the specimen a concave form. Found in the 1960s. Ed Gary Hansen collection material.