Emery

• corundom

  Very hard mineral used as an abrasive.

• emery

  A hard grey-black mineral consisting of corundum and either hematite or magnetite; used as...

Amphibole Group

• amphibole group

  A group of minerals with similar crystal structures containing a silicate chain...

• amphibole

  A mineral or mineral variety belonging to the amphibole group.

Bauxite

• bauxite

  A clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum...

• gibbsite

  White crystalline mineral consisting of aluminum hydroxide; a constituent of bauxite and...

Also contains

• gadolinite

  A mineral that is a source of rare earths; consists of silicates of iron and beryllium...

• garnet

  Any of a group of hard glassy minerals (silicates of various metals) used as gemstones and...

• apatite

  A common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate;...

• bastnasite

  A yellow-to-brown mineral that is a source of rare earth elements.

• beryl

  The chief source of beryllium; colored transparent varieties are valued as gems.

• carnallite

  A white or reddish mineral consisting of hydrous chlorides of potassium and magnesium;...

• earth color

  A colored mineral used as a pigment.

• fergusonite

  A dark mineral consisting of oxides of yttrium and erbium and tantalum and other mi...

• chrysoberyl

  A rare hard yellow green mineral consisting of beryllium aluminate in crystal form;...

• fluorite

  A soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source...

• borax

  An ore of boron consisting of hydrated sodium borate; used as a flux or cleansing agent.

• bornite

  A mineral consisting of sulfides of copper and iron that is found in copper deposits.

• celestite

  A mineral consisting of strontium sulphate.

• cassiterite

  A hard heavy dark mineral that is the chief source of tin.

• chalcocite

  A heavy grey mineral that is an ore of copper.

• cerussite

  A mineral consisting of lead carbonate that is an important source of lead.

• chalcopyrite

  A yellow copper ore (CuFeS2) made up of copper and iron sulfide.

• chromite

  A brownish-black mineral; the major source of chromium.

• cinnabar

  A heavy reddish mineral consisting of mercuric sulfide; the chief source of mercury.

• halite

  Naturally occurring crystalline sodium chloride.

• cobaltite

  A rare silvery-white mineral; important ore of cobalt.

• cordierite

  A blue mineral of magnesium and iron and aluminum and silicon and oxygen; often used...

• cristobalite

  A white mineral consisting of silica; found in volcanic rocks.

• cuprite

  A mineral consisting of cuprous oxide that is a source of copper.

• cryolite

  A white mineral consisting of fluorides of aluminum and sodium; a source of fluorine.

• dolomite

  A light colored mineral consisting of calcium magnesium carbonate; a source of magnesium;...

• galena

  Soft blue-grey mineral; lead sulfide; a major source of lead.

• garnierite

  A green mineral consisting of hydrated nickel magnesium silicate; a source of nickel.

• germanite

  A rare reddish-grey mineral consisting of a copper iron germanium sulfide.

• amblygonite

  A white or grey mineral consisting of lithium aluminum phosphate; a source of lithi...

• argentite

  A valuable silver ore consisting of silver sulfide (Ag2S).

• arsenopyrite

  A silver-white or grey ore of arsenic.

• argyrodite

  A rare steel-grey mineral consisting of silver and germanium and sulfur.

• baddeleyite

  A mineral consisting of zirconium oxide.

• chlorite

  A generally green or black mineral; it occurs as a constituent of many rocks typically...

• columbite-tantalite

  A valuable black mineral combining niobite and tantalite; used in cell phones...

• crocolite

  A rare lead chromite mineral that forms bright orange crystals.

• erythrite

  A reddish mineral consisting of hydrated cobalt arsenate in monoclinic crystalline form...

• glauconite

  A green mineral consisting of hydrated silicate of potassium or iron or magnesium or...

• greenockite

  Ore of cadmium; a rare yellowish mineral consisting of cadmium sulphide in crystalline...

• ader wax

  A waxy mineral that is a mixture of hydrocarbons and occurs in association with petroleum;...

• aragonite

  A mineral form of crystalline calcium carbonate; dimorphic with calcite.

• augite

  Dark-green to black glassy mineral of the pyroxene group containing large amounts of aluminum...

• asphalt

  A dark bituminous substance found in natural beds and as residue from petroleum distillation;...