4, Oxides
MeₓOy
Quartz, Corundum, Hematite, Rutile
15 specimens in the collection

Oxides

Compounds of metals with oxygen. This vast class includes quartz, the most abundant mineral in the Earth's crust, as well as corundum (ruby and sapphire), hematite and magnetite. Oxides are generally hard, stable and chemically resistant.
Very hard Includes gems Major rock-formers

Minerals of the Oxides class

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Bright yellow botryoidal brucite cluster on white matrix from Pakistan.
Brucite
Pale green muscovite on black cassiterite crystal from China with reflection.
Cassiterite & Muscovite
Dendritic native copper cluster with dark cuprite crystals and mirror reflection.
Copper coated with Cuprite
Light blue botryoidal gibbsite crust coating a dark brown matrix.
Gibbsite
Iridescent botryoidal goethite specimen from USA against black background.
Goethite
Elongated iridescent botryoidal goethite specimen from Spain against black.
Goethite (Iridescent Stalactite)
Black metallic hausmannite crystal cluster with a reflection on black.
Hausmannite on Manganite & Calcite
Dark gray octahedral hematite pseudomorph from Argentina with mirror reflection.
Hematite ps. Magnetite
Highly lustrous specular hematite crystal cluster from Italy with reflection.
Hematite var Specularite
Black botryoidal heterogenite specimen from Congo with green chrysocolla spots.
Heterogenite & Chrysocolla
Black metallic ilmenite with green titanite displaying a vertical reflection.
Ilmenite with Titanite
Iridescent botryoidal limonite specimen from China against a black background.
Limonite
Black prismatic manganite crystal cluster from Canada with mirror reflection.
Manganite
Yellow quartz crystals on bladed black hematite matrix with mirror reflection.
Quartz & hematite
Deep red zincite specimen with pale green willemite vein on black background.
Zincite & Willemite