Clinohumite
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Clinohumite is an uncommon member of the humite group, a magnesium silicate according to the chemical formula 942. The formula can be thought of as four olivine, plus one brucite. Indeed, the mineral
Two intergrown crystals (1.5 x 1 x 0.5 cm) from Koksha Valley, Badakhshan Province, Afghanistan
Crystal structure of clinohumite in polyhedral representation, a-axis projection, b-horizontal. H atom are blue spheres.
Diopside
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Diopside is a monoclinic pyroxene mineral with composition MgCaSi2O6. It forms complete solid solution series with hedenbergite and augite, and partial solid solutions with orthopyroxene and pigeonite
Diopside crystal from De Kalb, New York (size: 4.3 x 3.3 x 1.9 cm)
A green diopside found in Outokumpu, Finland
Gemmy specimen from Xinjiang, China