Pinolite
Pinolite is a rock consisting of dolomite, graphite and magnesite. Dolomite colored with graphite from light gray to almost black, with inclusions of white magnesite grains, similar to pine seeds (hence the name pine).
The most famous samples from Austria (Styria, Lower Austria, Tyrol). In 1991, pinolite samples from Navarre, Spain, described. It used as a decorative stone.
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