Spodumene: Spodumene is a lithium aluminum silicate that crystallizes in the monoclinic system. It is one of se... (read full)

Spinel: Spinel is an extensive group of minerals in which magnesium may be replaced with iron, zinc, and a... (read full)

Sphalerite: Sphalerite is a zinc iron sulfide mineral formed in an isometric system. It is trimorphous with wurt... (read full)

Spessartine: Spessartine is the manganese-aluminum variety of Garnet, belonging to its sub-group of aluminum garn... (read full)

Sodalite: Sodalite is a sodium aluminum silicate chloride in the Sodalite group with an isometric crystal syst... (read full)

Smithsonite: Smithsonite is a mineral in the group of Nitrates, Carbonates, Borates, with a hexagonal crystal sys... (read full)

Sinhalite: Sinhalite is a magnesium aluminum borate, and is most commonly found as transparent honey-yellow to ... (read full)

Silver: Silver is a Native Element with an isometric system, a soft, white, precious metallic element of gro... (read full)

Sillimanite: Sillimanite is a grayish-blue aluminum silicate with an orthorhombic crystal system. It is trimorphi... (read full)

Shell: Shell is the hard, protective, outer layer covering of certain creatures found in saltwater or fresh... (read full)