Black Moss Opal 12mm Coin 8in

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Black Moss Opal, from Australia, is a milky-white to brownish colour with dark greenish moss-like inclusions. Moss opal is also known as Dendritic Opal, for the tree-like shape of the inclusions. Sadly - it has none of the spectacular play of color that one might hope for from an opal from Australia, which makes it common opal, but is still a handsome stone for all of that. Opal is defined as an amorphous mineraloid comprised of hydrated silicon dioxide - aren't you glad you asked! 12mm Approx. 16 on 8 inch (20.32 cm) strand. (strand) Show more