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Labradorite
Labradorite is a calcium-rich feldspar mineral exhibiting iridescence (schiller effect).
The base color of labradorite is a dark smoky gray, but when light strikes the stone in a particular direction, it displays striking rainbow-colored reflections. Most typically, these metallic tints are violet, blue and green; but sometimes yellow, orange and red can be seen. This effect is so unique to labradorite that it is referred to as labradorescence.
Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope.
See base photo of the stone against a cm scale. www.flickr.com/photos/126878250@N07/53081625082/in/datepo... This image is approx 1cmx1cm. It is possible to see the inclusion on the original base image.
Labradorite
Labradorite is a calcium-rich feldspar mineral exhibiting iridescence (schiller effect).
The base color of labradorite is a dark smoky gray, but when light strikes the stone in a particular direction, it displays striking rainbow-colored reflections. Most typically, these metallic tints are violet, blue and green; but sometimes yellow, orange and red can be seen. This effect is so unique to labradorite that it is referred to as labradorescence.
Labradorization is the peculiar reflection of the light from submicroscopical planes orientated in one direction (rarely in two directions); these planes have never such a position that they can be expressed by simple indices, and they are not directly visible under the microscope.
See base photo of the stone against a cm scale. www.flickr.com/photos/126878250@N07/53081625082/in/datepo... This image is approx 1cmx1cm. It is possible to see the inclusion on the original base image.