I love calcite, specially the one that resembles ice even when calcite like selenite can be a picky stone. Drilled with large holes, the focal element has a rustic unpolished copper element with a solitaire African metal bead and has a drilled "Ice" for each side as companions. You can add a loop/bail or use as they are depending on your design.
They measure -total- 77x35x10mm, 33x15x13mm and 30x19x12mm approx.