peterobrien186
14march17D
Absorbed Twin
Taken with partially, crossed-polarized light at a specific angle, a pseudo-pleochroic effect gives rise to odd color centers and highlights internal structural detail. In this crystal's center you can see what appears to be an absorbed twin. Constantly changing conditions within snow forming regions of a cloud must have changed from tabular growth to columnar, then quickly back to tabular before twinning could be properly established.
14march17D
Absorbed Twin
Taken with partially, crossed-polarized light at a specific angle, a pseudo-pleochroic effect gives rise to odd color centers and highlights internal structural detail. In this crystal's center you can see what appears to be an absorbed twin. Constantly changing conditions within snow forming regions of a cloud must have changed from tabular growth to columnar, then quickly back to tabular before twinning could be properly established.