Epidote in fluorapatite
Article Abstract:
Epidote is a calcium iron silicate hydroxide which is sometimes found as long, thin and greenish inclusions in fluorapatite. Epidote oftentimes occur in metamorphic rocks and shows a very distinct pleochroism. They are sharp, needlelike, striated and very conspicuous in fluorapatite.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1992
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Chromite in williamsite
Article Abstract:
Chromite is an iron chromium oxide crystal typically black and opaque with an iridiscent tarnish. It may be found as an inclusion in williamsite, a variety of the serpentine group found at the Line Pit Chrome mine on the Maryland-Pennsylvania state border.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1993
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Copper in labradorite
Article Abstract:
Copper inclusions are characteristic of labradorites called Oregon sunstones These inclusions were probably a result of copper impurities being exsolved after being exposed to extremely high temperatures.
Publication Name: Lapidary Journal
Subject: Hobbies and crafts
ISSN: 0023-8457
Year: 1992
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