Magnetite
 

Asbestos
 

Lignite
 

Rhodonite
 

Marble
 

Azurite
 

Malachite
 

Stibnite
 

Barite
 

Quartz, quartzite, amethyst, smoky quartz, aventurine quartz
 

Aragonite
 

Zeolite
 

Dolomite
 

Copper
 

Chalcedony
 

Kyanite (Disthene)
 

Iron Pyrite
 

Amethyst
 

Obsidian
 

Sulphur or Sulfur
 

Gypsum
 

Agate (Chalcedony )
 

Rhodocrosite
 

Chrysotile (Serpentine)
 

Onyx
 

Ruby (Corundum)
 

Aventurine (Quartz)
 

Jadeite
 

Garnet
 

Calcite
 

Iceland Spar
 

Quartz Crystals
 

Galenite Crystals
 

Iron-pyrite Crystals
 

Chert
 

Flint
 

Bauxite
 

Haematite
 

Crystallized Rhodonite
 

Opal
 

Solid volcanic spurts
 

Tiger's eye
 

Pyrolusite
 

Chrysocolla
 

Chalcedony
 

Chromite
 

Sodalite
 

Labradorite
 

Amazonite (Microcline)