Black tabular crystals to 0.5mm in aggregates (second photo) 5mm across. The reverse side has stringers of Cechite. The crystals are tabular with pyramidal forms and look very similar to Descloizite, which is not too surpising given the formula and crystal classes of each. In fact Cechite is a member of the Adelite-Descloizite group. The matrix is Calcite. Very nice peice.