Some chemical compounds can have more than one crystal form. Calcite and Aragonite would be such an example.
In addition, there can be substitution of one element by another of similar charge and mass. In a specimen of heulandite I have, some of the original calcium has been replaced by barium, and eventually by strontium, to the extent of about 10%.
The mica group would be a good example of various forms of very similar minerals.
To some extent it depends upon how strictly one conforms to the definition of a mineral with 'a fixed chemical composition'.
Additionally, the effect of including trace contaminants is well illustrated in the various silicate crystal gems.
A mineral deposit can become an ore when it becomes profitably extractable. Nevertheless, factors affecting prices include supply versus demand, production costs, stocks on hand, government (price controls), possibility of supply disruption, technology (substitution, recycling), geopolitics, and exchange rate.
The mineral is found as part of the natural rock and is an ore, as in copper ore, iron ore, and so on.
Not necessarily. An ore is a mineral deposit that contains some resource that can be extracted profitably. So while ores are minerals, most minerals are not ores.
It is so because metals cannot be extracted from minerals in a convenient way. E.g.:- Aluminum metal is found in both minerals: clay and bauxite. Aluminum metal is extracted only from bauxite in a convenient way. So, bauxite is an ore of aluminum. On the other hand, it is not extracted from clay so clay remains only as mineral not ore of aluminum.
You might mean ore, and an ore is just any unrefined mineral that usually contains metal. So gold can be a part of ore, but ore does not necessarily have to contain gold.
A mineral containing a useful substance is an ore. Example: Bauxite is an ore, from which is extracted the commercially valuable metal aluminum.
Diamond is an allotrope of the element carbon, so may be classified as a mineral (it can be colored by elemental impurities). About 20% of all diamonds mined are gem-quality stones, leaving the remainder to be classified as industrial diamonds. Diamond is not an ore.
Concentration of ore Unwanted rocks, sand and grit from the mineral ore are called gangue or matrix. These have to be removed so that the mineral ore is concentrated with higher percentage of metal. Ores are mined from deep within the earth's crust in the form of rocks. The minerals are embedded in these rocks. The rocks are first crushed into smaller pieces by crushers. Then they are ground to powder by ball mill and other processes so that powdered ore is obtained. Depending on the type of ore, hydraulic washing, froth floatation process, magnetic separation and chemical separation techniques are applied for concentrating an ore.
Some chemical compounds can have more than one crystal form. Calcite and Aragonite would be such an example. In addition, there can be substitution of one element by another of similar charge and mass. In a specimen of heulandite I have, some of the original calcium has been replaced by barium, and eventually by strontium, to the extent of about 10%. The mica group would be a good example of various forms of very similar minerals. To some extent it depends upon how strictly one conforms to the definition of a mineral with 'a fixed chemical composition'. Additionally, the effect of including trace contaminants is well illustrated in the various silicate crystal gems.
It depends the chemical and physical properties of the raw materials. Beneficiation Equipment can be divided into Flotation Machine, High-frequency Screen, Hydrocyclone, Magnetic Separation Machine, Spiral Classifier. Flotation machine are mainly used in mineral ore dressing plants, selecting the valuable mine from gangue. It is applicable for the separation of numerous of mineral ores, such as fluorite and talc, gold ore, copper ore, iron ore and zinc ore and so on. High-frequency screen is a good choice for screening and grading the fine particles of mineral ores. This machine has wide application in iron ore, tin ore, tungsten ore, tantalum ore, dolomite sand and some other kinds of mining dressing plants' screening and grading work. Hydrocyclone has wide application in metal ore and nonmetal ore processing plants, such as plants of iron ore dressing industry, manganese ore beneficiation industry, coal industry, environmental power, alumina industry and some other mining industries. Magnetic separator is mainly used in wet separating of the fine minerals with strong ferromagnetism. The wet-type drum permanent magnetic separator is mainly suitable for wet separating of the following ores with the sizes less than 3mm, which are magnetite, magnetic pyrite, baking ore, and limonite and so on.
Concentrating an ore involves separating the valuable minerals from the waste materials in order to increase the concentration of the desired element or metal. This process typically involves crushing and grinding the ore, followed by physical and/or chemical methods such as gravity separation, froth flotation, or magnetic separation to achieve a higher grade of the desired mineral.
The mineral hematite is an important source of iron ore. It is commonly used in the production of steel and as a pigment in paints. So, if you're into building stuff or making your walls pretty, hematite is your go-to mineral.