Potassium feldspar comes in three different crystal structures that depend on the temperature it formed at. The minerals in diorite will mainly be plagioclase feldspar and in lesser amounts hornblende, biotite, and pyroxene. I have a igneous rock from somewhere in Sicily it has lots of smokey black gems in it. It has microcline Feldspar in it. he is a rock collector. Good Quality processed feldspar, for use in ceramics, specialised brick making etc is worth about $70 - $200 per tonne. Chalcedony, sometimes also misclassified as moonstone, is worth much … Features of Potash feldspar grinding mill price : 1.High Efficiency Under the same finished final size and the same motor power, the capacity of Potash feldspar grinding mill price is twice as much as jet mill, mixing grinder and ball mill, and energy consumption decreased 30%. The worth of diorite will be determined by its application. Rainbow moonstone, or labradorite, a type of transparent plagioclase feldspar (as opposed to real moonstone which is orthoclase feldspar, more on this in the first article of this series) can sometimes fetch a higher price, but not too much. Best Answer: Feldspar is an industrial mineral, and therefore has a relatively low price. In glassmaking, feldspar provides alumina for improving hardness, durability, and resistance to chemical corrosion. Good Quality processed feldspar, for use in ceramics, specialised … »More detailed Feldspar is an industrial mineral, and therefore has a relatively low price. In ceramics, feldspar is used as a flux, lowering the vitrifying temperature of a ceramic body during firing and forming a glassy phase. the gems in it look like they have smoke going through them and they have no cracks in them. Glass and ceramics continued to be the major end uses of feldspar. Microcline is the stable form below about 400 C. Orthoclase and sanidine are stable above 500 C and 900 C, respectively. This mineral is often called potassium feldspar or K-feldspar because potassium always exceeds sodium in its formula. When in the form of crushed diorite stone for building material, the worth and value will be inexpensive. I brought it to my science teacher and he wanted it and said it might be radioactive.
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