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Black alabaster is a rare anhydrite form of the gypsum-based mineral. The black form is found in only three veins in the world, one each in United States, Italy, and China. Alabaster Caverns State Park, near Freedom, Oklahoma, is home to a natural gypsum cave in which much of the gypsum is in the form of alabaster. There are several types 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 ...
Alabaster Caverns State Park is a 200-acre (0.81 km 2) state park approximately 4.5 miles (7.2 km) south of Freedom, Oklahoma, United States near Oklahoma State Highway 50. [3] The park attracted 24,706 visitors in FY 2016, The lowest count of the three parks in its part of Oklahoma.
In hand-sized samples, it can be anywhere from transparent to opaque. A very fine-grained white or lightly tinted variety of gypsum, called alabaster, is prized for ornamental work of various sorts. In arid areas, gypsum can occur in a flower-like form, typically opaque, with embedded sand grains called desert rose. It also forms some of the ...
Alabaster gypsum sand covers 275 square miles of dune fields in this southern New Mexico site run by the National Park Service. Related: 32 National Monuments Everyone Should Visit at Least Once
Alabaster (variety of gypsum) Alexandrite (variety of chrysoberyl) Allingite (synonym of amber) Alum; Amazonite (variety of microcline) Amethyst (purple variety of quartz) Ametrine (variety of quartz) Ammolite (organic; also a gemstone) Amosite (asbestiform grunerite) Antozonite (variety of fluorite) Anyolite (metamorphic rock - zoisite, ruby ...
This has led to all the English medieval output being referred to as "Nottingham alabaster". Alabaster is a mineral composed of gypsum and various impurities, is much softer and easier to work than marble and a good material for mass production, though not suitable for outdoors use. Carvings were made as single figures, assemblies for tomb ...
Within the field of icon painting, levkas is the mixture of fine alabaster powder, calcium sulfate (a form of gypsum), or calcium carbonate (chalk) along with glue (often rabbit skin glue, sometimes fish glue derived from the bladder of a sturgeon) applied in layers to a surface prior to gilding that surface with gold leaf or painting it, similar to gesso.