Olivine Group Flashcards
Olivine
(Mg,Fe)2 SiO4
Forsterite
Mg2SiO4
Fayalite
Fe2siO4
Monticellite
Ca(Mg,Fe)2SiO4
Kirschsteinite
CaFeSiO4
Tephroite
Mn2SiO4
___ is the magnesium rich end-member of the olivine solid solution series
Forsterite
Forsterite is named in _ by _ in honor of _, German mineral collector and mineral dealer.
(A) 1824
(B) Armand Lévy
(C) Adolarius Jacob Forster
Forsterite is associated with __ and __, and has also been found in ___.
(A) igneous and metamorphic rocks
(B) meteorites
Polymorphs of forsterite:
Wadsleyite (also orthorhombic) and Ringwoodite (isometric).
Foresterite forms a series with:
(A) Fayalite (Fayalite-Forsterite Series)
(B) Tephroite (Forsterite-Tephroite Series)
Variety of Forsterite:
(A) Peridot (green gem variety),
(B) Jian Forsterite Jade (mainly contains Forsterite and Serpentine)
Forsterite is common in __, __, __, __, and __.
dunite, gabbros, diabase, basalts, and trachytes.
Forsterite Properties
Color
Streak
Luster
Hardness
Crystal System
Fracture
- Green, pale yellow/white
- White
- Vitreous
- 7
- Orthorhombic
- Conchoidal
Fayalite is named after the Island of Fayal of the Azores in Portugal by ___ in ___.
(A) Christian Gottlieb Gmelin
(C) 1840