Collections

Grouped by what things are used as rather than by what they are. Something can appear in several collections at once — diamond is both a gemstone and an abrasive — because how a material is used is a fact about the world, not a filing decision.

• Gemstone

  34 gemstones — Agate, Amazonite, Amber…

• Ore

  57 ores — Acanthite, Air, Apatite…

• Pigment

  12 pigments — Azurite, Charcoal, Cinnabar…

• Abrasive

  10 abrasives — Aluminium oxide, Cerium, Corundum…

• Refractory

  17 refractories — Aluminium oxide, Asbestos, Chromite…

• Construction material

  47 construction materials — 5000 series aluminium alloy, 6000 series aluminium alloy, Aggregate…

• Electrical conductor

  11 electrical conductors — Battery graphite, Copper, Electrical steel…

• Insulator

  14 insulators — Aluminium oxide, Amber, Asbestos…

• Semiconductor

  8 semiconductors — Cadmium telluride, Gallium, Gallium arsenide…

• Catalyst

  2 catalysts — Platinum, Rhodium

• Fuel

  8 fuels — Charcoal, Coal, Crude oil…

• Medicinal

  7 medicinal materials — Actinium, Amalgam, Baryte…

• Foodstuff

  2 foodstuffs — Halite, Salt

• Currency metal

  6 currency metals — Copper, Cupronickel, Electrum…

• Collectible specimen

  9 collectible specimens — Amber, Amethyst, Fluorite…

• Toolmaking material

  12 toolmaking materials — Aramid fibre, Bone, Brass…

• Agricultural input

  7 agricultural inputs — Apatite, Limestone, Peat…

• Radiation source

  7 radiation sources — Americium, Californium, Curium…

• Optical medium

  12 optical media — Erbium, Fused silica, Gallium nitride…