Olivine is a silicate mineral. Diamond is an elemental mineral. Pyrite is a sulfide mineral. Malachite is a carbonate mineral.
Malachite is copper carbonate hydroxide. Diamond is carbon. Pyrite Is iron sulphide. Olivine is magnesium iron silicate.
It is a non silicate, I think?
Ice structure and Diamond structure.(two more examples of a non-silicate structure: Pyrite structure and natural gas hydrates).
A pyroxenite is an ultramafic rock composed mainly by clinopyroxene, orthopyroxene and in minor amount, olivine (less than 40%). Depending of the modal mineralogy, the can be subclassified as orthopyroxenite (90% or more of opx), clinopyroxenite (90% or more than cpx), websterite (10% or less of olivine) and olivine-websterite (10-40% of olivine). Because the composition of these mineral phases is highly variable, pyroxenites have a broad range of compositions, however, they usually tend to have more SiO2 than peridotites.
Important examples of silicate mineral species include forsterite (in the olivine group), almandine (in the garnet group), epidote, schorl (in the tourmaline group), enstatite (in the pyroxene group), actinolite (in the amphibole group), muscovite (in the mica group), albite (in the feldspar group), stilbite (in the zeolite group), and quartz. Important examples of non-silicate mineral species include calcite, gypsum, fluorite, hematite, galena, and gold.
It can be scratched by a diamond, corundum, topaz, and quartz.
A non silicate mineral is one that does not contain the combination of silicon and oxygen in the chemical formula of the mineral. The mineral pyrite is a non silicate with the chemical formula FeS2 (iron and sulfur).
The term "iron ore" is quite general, and can be applied to a number of different minerals, like hematite, magnetite, goethite, or pyrite.
It can be scratched by a diamond, corundum, topaz, and quartz.
Diamond, graphite, quartz, topaz, calcite, fluorite, dolomite, magnetite, hematite, pyrite...
Pyrite is the mineral whereas a pyrite 'cube' happens to be the habit in which the mineral has crystallised
pyrite is made of FeS2