Stishovite mineral Britannica

Stishovite high pressure metastable polymorph of silica SiO2 having a rutile type tetragonal structure silicon is in six fold coordination with oxygen while

Silica mineral Britannica

The crystallographic structures of the silica minerals except stishovite are dark coloured patterns set in a lighter field are called moss agate or Mocha stone

STISHOVITE Silicon Dioxide Amethyst Galleries

Stishovite is a polymorph of quartz and the other members of the quartz group meaning that it is composed of the same chemistry but has a different structure

Stishovite Wikipedia

Stishovite is an extremely hard dense tetragonal form polymorph of silicon dioxide It is very rare on the Earth 39 s surface however it may be a predominant form

Stishovite The mineral Stishovite information and pictures

Detailed description properties and locality information guide about the meteorite oxide stishovite