Amethyst stalactites are found in some geode formations and are commonly cut and polished when they are not of collector quality. This is a cross-sectional slice of an amethyst crystal covered agate stalactite. There are concentric, bulls eye, bands of different colored agates ringed by transparent amethyst. This piece has been polished to a glass luster front and rear. The rear does not have a bulls eye. The perimeter is natural. This slice measures 2 7/16 x 2 1/8 x 3/16 inches or 61 x 54 x 4 mm.