The Mina Ojuela has produced beautiful and striking combination material. Glassy, flattened, colorless calcite rhombs comprise this thin cabinet crust, which is richly and aesthetically included with beautiful, robin's-egg-blue aurichalcite. Some of the calcite rhombs are included with aurichalcite and some are not, which really adds to the attractiveness of this fine piece. Pieces of this quality came out in the mid-1960s, with none since. Ex. Mullane Collection.