Colemanite - Wikipedia
Colemanite (Ca 2 B 6 O 11 ·5H 2 O) [6] or (CaB 3 O 4 (OH) 3 ·H 2 O) [4] is a borate mineral found in evaporite deposits of alkaline lacustrine environments. Colemanite is a secondary mineral that forms by alteration of borax and ulexite. [3]
Colemanite | Borax, Borates, Ulexite | Britannica
Colemanite, borate mineral, hydrated calcium borate (Ca2B6O11·5H2O) that was the principal source of borax until the 1930s. It typically occurs as colourless, brilliant crystals and masses in Paleogene and Neogene sediments (those formed 65.5 to 2.6 million years ago), where it …
The Mineral colemanite - The Mineral and Gemstone Kingdom
Colemanite forms in evaporite deposits together with other borates, and is one of the more stable of borate minerals. It is pyroelectric, and develops an electrical charge during a change of temperature.
Colemanite Mineral Data
Colemanite. Comments: Large crystals of brown colemanite with second generation of absolutely clear and gemmy (colorless) colemanite. Intensely fluorescent in long and short UV.. Location: Mustafakemalpascha Mine, West-Anatolia Turkey.
Colemanite Gem Guide and Properties Chart - Gemstones.com
This Colemanite gemstone guide lists qualities of the Colemanite gem type, including stone colors, common names, meanings, gemstone hardness and more.
Colemanite Gemstone: Properties, Meanings, Value & More
2023年7月4日 · Colemanite is a semi-precious gemstone that’s usually colorless, gray, or white, though it can also be pale shades of yellow, pink, orange, or brown. Some synonyms for colemanite are borspar and neocolemanite.
COLEMANITE (Hydrated Calcium Borate Hydroxide)
Colemanite, like other borates, is a complex mineral, that is found in playa lakes and other evaporite deposits. The basic structure of colemanite contains endless chains of interlocking BO 2 (OH) triangles and BO 3 (OH) tetrahedrons with the calciums, water molecules and extra hydroxides interspersed between the chains.
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