General Information: Chemical Formula:CaMgSi2O6
Composition:(Molecular Weight = 216.55 gm)
Calcium 18.51 %
CaMagnesium 11.22 %
MgSilicon 25.94 %
SiOxygen 44.33 %
O Empirical Formula: CaMg(Si2O6)
Environment:Basic and ultrabasic igneous and metamorphic rocks.
IMA Status:Approved IMA 1987
Locality:Wide spread occurrence.
Name Origin:From the Greek dis - "two kinds" and opsis - "opinion."
Physical Properties: Cleavage:[110] Good, [???] Indistinct
Color:blue, brown, colorless, green, or gray.
Density:3.25 - 3.55, Average = 3.4
Diaphaniety:Transparent to translucent
Habits:Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Blocky - Crystal shape tends to be equant (e.g. feldspars)., Granular - Generally occurs as anhedral to subhedral c rystals in matrix.
Hardness:6 - Orthoclase
Luminescence:None.
Luster:Vitreous (Glassy)
Streak:white green
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