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Minerals, gems and meteorites

1-9 Native Elements

Native Elements are composed of atoms from a single element.

10-75 Sulphides

Sulphides are composed of positively charged ions, combined with sulphur.

76-80 Sulphosalt

Sulphosalts are those in which a metal is combined with sulphur.

81-112 Oxides

Oxides include those in which oxygen is combined with one or more metals.

113-125 Halides

Halides include chlorine, bromine, fluorine, and iodine, which are known as the halogen elements.

126-175 Carbonates

A carbonate is a salt of carbonic acid, characterized by the presence of the carbonate ion.

176 Borates

Borates are boron-oxygen compounds, which form boron oxyanions.

177-208 Sulphates

Groups of sulphide ions combine with metals to form Sulphate minerals.

209-226 Chromates

Chromate minerals are formed from the oxidation of copper-iron-lead sulphide ores.

227-257 Phosphates, Arsenates and Vandates

Arsenic and vanadium form minerals of similar form to the phosphates.

258-267 Tungstates and Molybdates

Composed of element of tungsten or molybdenum, or a mixture of both, in combination with a metal.

268-402 Silicates

A silicate is any member of a family of anions consisting of silicon and oxygen.

403-444 Zeolites

Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents and catalysts.

445-461 Gemstones

A piece of mineral crystal which, in cut and polished form, is used to make jewellery and adornments.

462-475 Meteorites

Meteorites and tektites are considered as extra-terrestrial rocks and not discrete minerals.

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