Properties of minerals

Is the most obvious but least dependable property. So
come in one color. Other minerals have a wide variety
calcite, which can be pink, orange, blue-green, red, bro
Sometimes other elements can cause a change in color
will have a different color if viewed under an ultraviole
minerals are considered to be fluorescent.
SEPT. 29, 2015
The color of cursed mineral powder is known as t
streak. A mineral is scraped across a streak plate
it leaves. The color of a mineral’s powder streak i
identifying minerals in two ways. The color of the
different than the color of the element or nearly e
streak color that stays the same regardless of the
Streak plates Are small squared of white, unglazed porcelain. A
streaks white or clear can’t be tested this way. Str
useful in identifying dark-colored minerals. If a st
available, a piece of fine sandpaper will work for t
Hardness describes how a substance will resist being
another substance.
Moh’s Scale
It is the standard scale for measuring the hardness of
developed by Frederick Mohs in 1822. The scale rat
through 10, with 1 being the softest and 10 being the
different mineral is represented by each number, wit
harder than the previous one.
The scale is relative in measurement. A mineral can
less than 4 in hardness. The hardness can be written
or in half number increments for in between hardnes
The way it reflect light is called luster. It is used to d
mineral looks. It is impossible to identify minerals th
luster on this characteristic alone. Some can have a m
Non-metalic minerals are shiny but not as reflective
that are not shiny are classed earthy or dull. Others m
silky, pearly, and vitreous (glassy). A mineral’s lust
to its chemical composition.
Minerals are made of crystals, and when the cryst
reveals a particular crystal shape. This shape is k
If the mineral does not have any crystalized fragm
not have cleavage.
The way a mineral is broken. Different minerals b
ways. Fracture can be used to describe the way a
when it does not have cleavage.