Minerals: Sulfides
Minerals are defined by five criteria: 1. Naturally Occurring, 2. Inorganic, 3. Solid, 4. Defined Chemical (Atomic) Formula, and 5. A unique set of physical properties.
Sulfides
-are chemical compounds in which sulfur has combined with metallic and semi-metallic elements.

Galena

Galena Cluster

Galena

Galena cubes

Stilbnite

Pentameral Pyrite Crystal

Pyrite Cluster

Pyrite Cluster

Pyrite Cluster

Pyrite cube in Marl

Pyrite cube in Marl

Marcasite “sun disk”

Marcasite cluster

Chalcopyrite

Bornite

Sphalerite

Sphalerite

Sphalerite on Matrix

Sphalerite

Orpiment

Orpiment

Reaglar

Reaglar

Reaglar

Pyrrhotite

Marmatite

Molybdenite
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Data: Pellant, Chris. Smithsonian Handbooks: Rocks and Minerals, The clearest recognition guides avaiable. A Dorling Kindersley Book.