Graphite is a naturally occurring mineral composed entirely of carbon. It is one of the few minerals classified as a...

Sulfur is one of the few minerals that occur naturally as a pure chemical element. Its bright yellow color, low...

Garnet is a group of closely related silicate minerals famous for their beautiful crystal forms, rich colors, and...

Miller Indices: Miller indices for crystallographic planes are the reciprocals of the fractional intercepts (with...

Crystal twinning is the symmetrical intergrowth of two or more crystals, related by a symmetry operation known as a...

Crystal symmetry refers to the regular arrangement of faces, edges, and other structural features in a crystal. This...