tremolite
tremolite from West Pierrepont, New York State, U.S.
Detailed sheet
tremolite
She was named in 1789 by the mineralogist J.G.A. Höpfner in relation to its supposed place of discovery: the Val Tremola in the St. Gotthard massif in Switzerland, but the sample was from another valley … Campolungo.
Chemically very close to actinolite (tremolite does not contain iron), it also comes in a fibrous form which is also called “asbestos”.
CHEMICAL CHARACTERISTICS
Ca2Mg5[Si8O22](OH)2
magnesium and calcium inosilicate
PHYSICAL CHARACTERISTICS
Main color
white
Other colors
brown, colourless, yellow, green, purple
Color of streak
white
Luster
silky, vitreous
Hardness
5.0 to 6.0
Density
2.95 to 3.10
Cleavage
perfect
Fracture
uneven
OPTICAL PROPERTIES
Transparency
translucent, transparent
Refractive index
1.560 - 1.645
Double refraction
0.017
definite, biaxial (-)
visible double refraction
No
Pleochroism
absent
Number of colors
1
Absorption spectrum
684
Fluorescence
weak
yellow, pink
CRYSTALS PROPERTIES
prismatic, sometimes fibrous
crystals system
monoclinic
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found in the Alps, in France (Corsica near Bastia, in the Pyrenees, Aure valley), in England (Cornwall), India, Pakistan, Malaysia (Borneo), Alaska, Canada (Ontario, Quebec, Manitoba), Greenland, Africa, Brazil (Bahia), Chile, Peru ..
use in jewelry
It’s faceted for collection in its many rare varieties colored orange or green.
Daily care
and precautions
Same risks as for fibrous actinolite, inhaled micro-crystals causes lung cancer.
Other
Gems
Venez visitez
notre site web
voillot-joaillier.fr
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo.Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus leo consectetur adipiscing elit. Ut elit tellus, luctus nec.
