Actinolite (calcium, magnesium, iron, silicate)
Hardness: 5-6
This light green specimen of Actinolite from Chester Vermont has green blades of crystal in talc. The Greek word "aktinos means "ray" and Actinolite crystals are somewhat like beams or rays. Actinolite is formed from the metamorphic process. It is found with Albite, chlorite and epidoite in greenstone.
Actinolite (a basic calcium magnesium "iron" silicate) When free of iron it is called tremolite.
Ca2(Mg,Fe)5Si8O22(OH)2
Moat Mt., North Conway, N.H.
In different regions of metamorphic environments the actinolite can be found with albite and Muscovite in hornfels. Where hydrothermal activity existed barite and anhydrite can also occur with actinolite.
Actinolite
A very special sample named the cross. These grayish transparent crystals forms thick prismatic blades, and have a diamond-shaped cross section.
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