Two hundred years ago they used crystals and sheets of mica that were large and transparent, that they were used as window panes in homes. Although this crystal does not have size, it is totally transparent. This crystal, measuring 3.5 cm in length, has outstanding luster, great form, and exhibits a lovely, golden color. To top it off, the matrix of massive, white, calcite nicely contrasts with the phlogopite. BEAUTIFUL example of gem mica!