mineraloid


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mineraloid

[′min·rə‚lȯid]
(mineralogy)
A naturally occurring, inorganic material that is amorphous and is therefore not considered to be a mineral. Also known as gel mineral.
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References in periodicals archive ?
According to the literature, shungite is a mineraloid consisting of more than 98% carbon (Mastarlez et al.
Opal is actually a mineraloid, defined as an inorganic natural substance with uniform chemical composition but no internal crystal structure; "potch" is a synonym for "common," with connotations of "valueless.
Another Derbyshire specialty in the collection is "Elastic Bitumen" from Castleton, including one huge lump of this intriguing mineraloid some 30 cm across.
Some mineralogists are reluctant to accept amorphous substances as mineral species because of the difficulty of determining whether the substance is a true chemical compound or a mixture, and the impossibility of characterizing it completely; the term mineraloid is sometimes applied to such substances.