The mineral I will be talking about is
On the Mohs scale Biotite can be from
2.5 to three in hardness.
Biotite is a form of Mica and is common
in Metamorphic Rocks, such as: Gness and Shist, and as well intrusive rocks
such as Granite.
The mineral is usually is
usually dark brown to black but can rarely be found in light yellow.
It's luster is glassy and
its cleavage is perfect basal and yielding thin flexableand elastic sheets.
It is also opaque to translucent.
Biotites Specific gravity
It has a white streak.
As a reaction with acid the
mineral would dissolve only when the acid is heated.
It has tubular crystals and
a hexagonal out line.
Biotite is usually found
in Bandcroft Ontario or in South eastern U.S.A.
It is formed when the chemical
elements of the rock and the pressure and tempeture conditions are right.
The Micas themselves make up a group of about then minerals.
Biotite is a mineral containing Potassium,
Aluminium, Silica, Oxygen, and some Hydrogen.
Mica has many uses: it is used as a thin
coating on rubber surfaces to overcome tackiness and sticking. It is also
used in paint to make it thicker and to make it last longer in the weather.
It can be used in sealers such as: wallboard, masonry and concreat blocks.
It is used in road and highway paints to make it more durable. It is also
used in caulking compounds, lubricants, greases, weilding rod coatings,
and dry power fire extinguishers.
That is all I have to say about
Here are Three Links To My Favourite Mineral
Stupid Page of Rocks