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Question ::Volcanic glass is not a mineral  Why ?

Volcanic glass is a rock.  The reason that volcanic glass is not a mineral is because a mineral has very specific traits i.e. including color, streak, luster, density, hardness, cleavage, fracture, tenacity, and crystal habit.  Volcanic can vary significantly in all of these traits and is therefore a rock.  Rocks are composed of minerals as is volcanic glass.

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Joe Norris


I am an economic geologist. An economic geologist does mineral evaluations and appraisals of mineral or mining properties. I can tell you if your deposit has value - remember that a mineral deposit, no matter how good, only has value when mined. Any value assigned to a mineral deposit, in the ground, is only the speculative value that deposit.


I have been a economic geologist for most of my 35 year career. Although I have done work in perhaps 45 states and numerious countries much of my work has been in Appalachian coal, intermountain west gold and silver, and Arizona uranium.

Past President of the Virginia Section of the American Institute of Professional Geologists and a certified geologist in twelve states.

BS Degree from Eastern Kentucky University. Work on MS Degree @ Eastern Kentucky University, Colorad School of Mines & Marshall University Numerious short courses on the value of mineral deposits and how to value same. Also several short courses dealing with the different types of geologic processes; sedimentary, igneous, metamorphic along with the mineral associated with each.

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