Browse Items (264 total)

Formula Mg3[Si2O5](OH)4 Structure Sheet silicate Crystal System Crystal system: monoclinic or orthorhombic (-) Optical Properties Serpentine is commonly very fine-grained. It can be recognised by its textural association with olivine…

Formula CaTi[SiO4](O, OH, F) Structure Orthosilicate Crystal System Crystal system: monoclinic (+) Physical Properties Colour in hand specimen: colourless, yellow, green, brown or blackCleavage: one, goodHardness: 5 Optical…

See metallic.

Have a look at the quartzites (L520, L521) in the 1A Reference Series.

See cross-hatched twinning.