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Aventurine

Aventurine comes from the Italian word ventura
Aventurine is very common and the largest sites are in Brazil, India, Zimbabwe and Russia.

Crystal system
Aventurine is common quartz and belongs to the oxides
SiO2 (quartz) + KAl2[(OH,F)2/AlSi3O10] + (Cr) (fuchsite) or Fe2O3 + Mg,Ti (hematite) or FeOOH (lepidocrocite)

Mohs hardness: 7
density: 2.64 - 2.69
fissility: none, uneven fracture
Line colour: white
Transparency: translucent to opaque

Healing Effects
letting go of worries, falling asleep, calmness, relieves nervousness, light-heartedness, cheerfulness, individuality