hydroxyapatite
Detailed sheet
hydroxyapatite
As for the apatite, its name derives from the Greek to indicate that the apatite has often been confused with other gems, plus the mention of “hydroxy”added . This is a major constituent of bones and teeth.There is a very dark green variety rich in manganese called manganapatite.
CHEMICAL CHARACTERISTICS
Ca5[PO4]3 OH
calcium phosphate
PHYSICAL CHARACTERISTICS
Main color
green
Other colors
white, brown, colourless, black
Color of streak
white
Luster
vitreous
Hardness
5.0 to 0.0
Density
3.15 to 3.20
Cleavage
indistinct
Fracture
conchoidal
OPTICAL PROPERTIES
Transparency
opaque, translucent
Refractive index
1.642 - 1.654
Double refraction
0.012
weak biaxial (-)
visible double refraction
No
Dispersion
-
Pleochroism
absent
Number of colors
1
Fluorescence
variable
CRYSTALS PROPERTIES
dipyramidal
crystals system
hexagonal
OTHER INFORMATIONS
APPROACHING GEMS
Exploited
sites
It is found on the Moneta island in Puerto Rico, in Brazil, Iran (Zharchouran mine), in Mexico at Durango, on the east coast of the United States, Canada, Mongolia, Russia (Kola Peninsula), in Ticino in Switzerland, Italy, Sweden.
use in jewelry
it is cut faceted for its beautiful color, for collectors.
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.
