Optical Calcite
Optical Calcite, also known as Icelandic Spar, is an optically clear variety of Calcite, originally reported from Helgustadir Mine, Eskifjord, Iceland, but is now found in other locations..
Optical Calcite
Optical Calcite, also known as Icelandic Spar, is an optically clear variety of Calcite, originally reported from Helgustadir Mine, Eskifjord, Iceland, but is now found in other locations..