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Crystals |
Record 201 to 215 of 215 |
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Twinned Crystal of Gypsum "...the two portions are symmetrical with respect to a plane parallel to the ortho-pinacoid." -The Encyclopedia Britannica 1910... |
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Twinning "Albite and Carlsbad twinning combined." -Johannsen, 1908... |
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Two Octahedra An illustration showing "two octahedra...united by contact along a surface parallel to an octahedron face without interpentration. " -Britannica, 1910... |
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Vesuvianite Vesuvianite.... |
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Vesuvianite Vesuvianite... |
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Vesuvianite "Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second orders, pyramid of first order and base." — Ford, 1912... |
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Vesuvianite "Tetragonal. Prismatic in habit. Often vertically striated. Common forms are prisms of first and second orders, pyramid of first order and base." — Ford, 1912... |
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Wernerite "Tetragonal; tripyramidal. Crystals usually prismatic. Prominent forms are prisms of the first and second order, pyramid of first." — Ford, 1912... |
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Wernerite "Tetragonal; tripyramidal. Crystals usually prismatic. Prominent forms are prisms of the first and second order, pyramid of first. Rarely shows the faces of the pyramid of the third order." —... |
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Zincite "A crystal of zincite with a prism terminated by a pyramid above a basal pinacoid below." — Ford, 1912... |
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Zircon Zircon.... |
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Zircon Zircon.... |
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Zircon Zircon.... |
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Zircon Zircon.... |
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Zircon "Tetragonal. Crystals usually show a simple combination of prism and pyramid of the first order. The prism of the second order and a ditetragonal pyramid also at times observed." — Ford, 1912... |
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