Oxides & Hydroxides

The following list includes the most significant minerals which occur in nature as oxides or hydroxides. The various forms of silica (quartz, chalcedony and opal) are also discussed on a separate page. To view the properties of an element, click on its name. 

ANATASE ARSENOLITE BAUXITE BIXBYITE BOLEITE BRAUNITE BROOKITE BRUCITE CASSITERITE CHALCOPHANITE CHROMITE CHRYSOBERYL COLUMBITE CONICHALCITE CORUNDUM CRISTOBALITE CUPRITE DELAFOSSITE DIASPORE ESMERALDITE FRANKLINITE GAHNITE GALAXITE GIBBSITE GOETHITE HAUSMANNITE HEMATITE HERCYNITE HETAEROLITE HOGBOMITE HOLLANDITE HUEBNERITE HYDROHETAEROLITE ILMENTITE LEPIDOCROCITE LIMONITE MAGNETITE MANGANITE MANGANOSITE MARTITE MINIUM MONTROYDITE OCTAHEDRITE OPAL PARAMELACONITE PERICLASE PITCHBLENDE PLATTNERITE PSILOMELANE PYROCHROITE PYROLUSITE QUARTZ RUTILE SENARMONTITE SKEMMATITE SPINEL STIBICONITE TELLURITE TENORITE TRIDYMITE TUNGSTITE TURGITE VALENTINITE VANOXITE WATER ZINCITE

(The database is not intended to be a comprehensive list of all minerals but does contain a substantial number of them and we are constantly adding to it.)
 

Mineral specimens now available (at eBay): Click on an item to view details and, if you wish, bid.

2 x ARAGONITE CRYSTAL “STARBURST” CLUSTERS, MOROCCO AU $12.50 (0 Bids) End Date: Monday Apr-29-2019 9:18:43 EST Bid now | Add to watch list 23.5 mm TERMINATED GEMMY LIGHT PINK DANBURITE CRYSTAL, MEXICO. AU $17.46 (0 Bids) End Date: Monday Apr-29-2019 9:09:37 EST Bid now | Add to watch list 13.8 mm TERMINATED TANZANITE CRYSTAL, TANZANIA AU $39.00 (0 Bids) End Date: Monday Apr-29-2019 9:03:52 EST Bid now | Add to watch list KYANITE CRYSTALS IN QUARTZ MATRIX KYANITE BLADES SPECIMEN 97 X 70 X 60 MM 446 G AU $29.00 (1 Bid) End Date: Sunday Apr-28-2019 20:41:44 EST Bid now | Add to watch list GREEN AVENTURINE ROUGH SPECIMEN 78 X 74 X 53 MM 243 AU $18.00 (0 Bids) End Date: Sunday Apr-28-2019 10:41:19 EST Bid now | Add to watch list Beautiful Chunky Andamooka Matrix Opal Slab AU $50.00 (1 Bid) End Date: Monday Apr-29-2019 18:52:21 EST Bid now | Add to watch list Andamooka Acid Treated Opal Matrix Rough Specimen AU $50.00 (0 Bids) End Date: Friday Apr-26-2019 18:36:52 EST Bid now | Add to watch list