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Use of old mineral names is also discontinued, for example when a name is no longer considered valid. Therefore, a list of recognised mineral species is never complete. Minerals are distinguished by various chemical and physical properties. Differences in chemical composition and crystal structure distinguish the various species.
This is a list of substances or materials generally considered discredited. A substance can be discredited in one of three ways: It was widely believed to exist at one time but no longer is. Such substances are often part of an obsolete scientific theory. It was once believed to have drastically different properties from those accepted now.
Amethyst crystals – a purple quartz Apophyllite crystals sitting right beside a cluster of peachy bowtie stilbite Aquamarine variety of beryl with tourmaline on orthoclase Arsenopyrite from Hidalgo del Parral, Chihuahua, Mexico Aurichalcite needles spraying out within a protected pocket lined by bladed calcite crystals Austinite from the Ojuela Mine, Mapimí, Durango, Mexico Ametrine ...
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The concept of mineral is distinct from rock, which is any bulk solid geologic material that is relatively homogeneous at a large enough scale. A rock may consist of one type of mineral or may be an aggregate of two or more different types of minerals, spacially segregated into distinct phases .
The following list creates a summary of the two major producers of different minerals (and coal, which is generally not considered a mineral). Fuels Fossil fuels ...
Mineral water: Danone: Common in Indonesia as a genericized mark for any mineral water. [citation needed] Aqua-lung: Open-circuit underwater breathing set with demand valve: See Aqua-lung#Trademark issues: Or nowadays often merely "scuba", or "air scuba", when there is a need to distinguish from rebreathers [citation needed] AstroTurf ...
Choosing the right material, then, means balancing style with durability—it needs to look good, but it also has to be able to withstand scratches, stains, heat, and the chaos of daily life.