Stishovite Mineral Physical and Optical Properties
Origin of Name Named after S.M. Stishov, an early investigator of high pressure SiO2 polymorphs. Hand Specimen Identification Stishovit…
Silicate Minerals
Silica Group Minerals
Silicate Minerals Quartz SiO2 Cristobalite SiO2 Tridymite SiO2 Coesite SiO2 Stishovite SiO2 Description of Minerals The silica group mineral…
Coesite mineral Physical and Chemical Properties
Origin of Name Named after L. Coes, who first described it in detail. Hand Specimen Identification Coeste cannot be identified in hand specimen.…
Tridymite (low tridymite) SiO2, Physical and Chemical Properties
Origin of Name From Greek for “threefold”, a reference to its habit of forming compound crystals of three individuals of threetriangular wedge-shape…
Cristobalite Mineral - Physical and Optical Properties
Origin of Name Named after occurrence at Cerro San Cristobal, Mexico. Hand Specimen Identification Cristobalite is difficult to identify in hand …
Quartz mineral - physical and Optical Properties
Origin of Name From German, quartz, of unknown origin. Hand Specimen Identification Hardness, lack of cleavage, conchoidal fracture, and vi…