Dims: 3.5" x 2.38" x 1.25"(8.9 x 6.0 x 3.2)
Wt: 5.18 oz.(147.0 g)
Tecoma Hill Mine, Lucin District, Box Elder County, Utah, U.S.A.
The Aurichalcite in this specimen started out as a crust that filled a narrow fissure in a shale or fine sandstone host. That is what one sees here: the matrix from one side of the fissure, coated with a crust of beautiful, pale blue intergrowing needles. None of the crystals exceed 1/8"(3 mm), and some spots show where the crystals were growing against the now-missing side of the fissure- small chips of that host rock are still attached. Likewise, any damage done to the Aurichalcite was likely due to the separation of the host. Some areas of the crust are coated with calcite, which likely strengthened those areas. The host rock is a light red-brown in color, which provides a lovely contrast to the sky-blue needles.