Thursday, September 25, 2014

ROCK TRIVIA: IOLITE
Its name comes from the Greek words “ios” for violet and “lithos” for stone. Iolite is trichroic which means that three different colors can be seen in the same stone depending on the viewing angle. This property is called pleochroism, and Iolite is the most extreme of any gem, exhibiting violet blue from one side, clear or greyish from the other, and honey or brown from the third. Iolite is typically light to dark blue and violet, with the most desirable color being an intense violet.
The major sources of gem grade iolite come from Sri Lanka, India, Madagascar and Burma. In recent history, gem-quality iolite was found in Palmer Canyon, as well as huge deposits at Grizzly Creek and Ragged Top Mountain Wyoming.
Pictured is a clear example of how varied Iolite's color can appear from different angles.

Photo: ROCK TRIVIA; IOLITE
Its name comes from the Greek words “ios” for violet and “lithos” for stone. Iolite is trichroic which means that three different colors can be seen in the same stone depending on the viewing angle. This property is called pleochroism, and Iolite is the most extreme of any gem, exhibiting violet blue from one side, clear or greyish from the other, and honey or brown from the third. Iolite is typically light to dark blue and violet, with the most desirable color being an intense violet. 
The major sources of gem grade iolite come from Sri Lanka, India, Madagascar and Burma. In recent history, gem-quality iolite was found in Palmer Canyon, as well as huge deposits at Grizzly Creek and Ragged Top Mountain Wyoming.
Pictured is a clear example of how varied Iolite's color can appear from different angles.

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