Augite is a standard black or brownish black pyroxene mineral of dark igneous rocks and some high grade metamorphic rocks.
Mineral black sparkly rock.
This shiny black rock is mostly used in making ornaments and jewelries.
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Its crystals and cleavage fragments are nearly rectangular in cross section at angles of 87 and 93 degrees.
It can also be found in various european countries including england czech republic and bohemia.
Fuses easily in a candle flame.
Pyrite is usually found associated with other sulfides or oxides in quartz veins sedimentary rock and metamorphic rock as well as in coal beds and as a replacement mineral in fossils but has also been identified in the sclerites of scaly foot gastropods.
A good sparkly rock would be one with a lot of muscovite mica in it something like a mica schist or granitic pegmatite.
Dense clusters or carpets of fibrous to acicular crystals.
These are the main things that distinguish it from hornblende see below.
A good sparkly mineral would be muscovite mica quartz calcite cerussite.
Jamesonite pb 4 fesb 6 s 14.
Grey to black.