Amesite is rare by normal standards,and Chrome Amesite is extremely rare (wikipedia).This beautiful mineral exhibits the fascinating property of tenebrescence; leave it in a dark room for an hour or so,then turn on the lights: it will appear steel grey and gradually take on its characteristic deep lilac color as it absorbs light (this is the same effect used in self-adjusting sun glasses).Overall specimen length is 1 to 2 inches.

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