Detailed sheet

stichtite

It is named after Robert Stich, the mine owner, where she was discovered in 1910, in Tasmania, Australia.



CHEMICAL CHARACTERISTICS

Mg6Cr2[CO3] (OH)16 - 4(H2O)

hydrated chromium and magnesium carbonate



PHYSICAL CHARACTERISTICS

Main color

pink

Other colors

purple

shades from pink to mauve, purple

Color of streak

white, pink

Luster

greasy, pearly, resinous, vitreous

Hardness

1.5 to 2.0

Density

2.20 to 0.00

Cleavage

perfect

Fracture

uneven

we see small flat areas on the fracture



OPTICAL PROPERTIES

Transparency

translucent

rarely transparent

Refractive index

1.510 - 1.540

Double refraction

0.026

definite uniaxial positive

visible double refraction

No

Dispersion

aucune

Pleochroism

absent

Number of colors

1

Fluorescence

none



CRYSTALS PROPERTIES

pseudo-hexagonal prisms

crystals system

trigonal



OTHER INFORMATIONS

Exploited
sites

It is found in Australia (Tasmania), Canada, Zimbabwe, South Africa, New Zealand, in the Urals in Russia.

Other
Gems

Venez visitez

notre site web

voillot-joaillier.fr

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