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Ron Bodoh is a master American craftsman and carver of flawless quartz crystal balls. He began producing the spheres in 1971, and had made 40 by 1974. [1] In 1976, Bodoh created what was then the third largest flawless quartz crystal ball in the world; it weighed almost 15 pounds (6.8 kg) and sold for US$40,000 to a private collector [2]
Optically, a crystal ball is a ball lens. For typical materials such as quartz and glass, it forms an image of distant objects slightly beyond the surface of the sphere, on the opposite side. Unlike conventional lenses, the image-forming properties are omnidirectional (independent of the direction being imaged) This omnidirectional focusing can ...
Herkimer diamonds are double-terminated quartz crystals discovered within exposed outcrops of dolomite in and around Herkimer County, New York, and the Mohawk River Valley in the US. [1][2] They are not diamonds; the "diamond" in their name is due to both their clarity and well formed faces. Because the first discovery sites were in the village ...
In the hexagonal family, the crystal is conventionally described by a right rhombic prism unit cell with two equal axes (a by a), an included angle of 120° (γ) and a height (c, which can be different from a) perpendicular to the two base axes. The hexagonal unit cell for the rhombohedral Bravais lattice is the R-centered cell, consisting of ...
Selenite, satin spar, desert rose, and gypsum flower are crystal habit varieties of the mineral gypsum.. All varieties of gypsum, including selenite and alabaster, are composed of calcium sulfate dihydrate (meaning that it has two molecules of water), with the chemical formula CaSO 4 ·2H 2 O. Selenite contains no significant selenium – The similar names both derive from Greek selḗnē ...
Gemstone. Group of precious and semiprecious stones—both uncut and faceted—including (clockwise from top left) diamond, uncut synthetic sapphire, ruby, uncut emerald, and amethyst crystal cluster. A gemstone (also called a fine gem, jewel, precious stone, semiprecious stone, or simply gem) is a piece of mineral crystal which, when cut or ...
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