knebelite
Sign in to savethumb | right | Knebelite specimen Knebelite is a manganese variety of the fayalite-tephroite series with formula . It forms dark green orthorhombic crystals. It is reported from a variety of locations in Sweden as well as South Africa, Russia, British Columbia, New Hampshire, and Rhode Island.
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thumb | right | Knebelite specimen Knebelite is a manganese variety of the fayalite-tephroite series with formula . It forms dark green orthorhombic crystals. It is reported from a variety of locations in Sweden as well as South Africa, Russia, British Columbia, New Hampshire, and Rhode Island.
==References==
Excerpted from Wikipedia’s “knebelite” article, available under the CC BY-SA 4.0 licence.