Zusammenfassung der Ressource
MINERAL PROPERTIES
- They are/have
- Solid
- Natural
- inorganic
- Fixed composition
- Crystalline structure
- formed by
- Crystals
- in a process called
- Crystallization
- depends on
- Time
- Space
- Temperature
- identified by
- MINERAL PROPERTIES
- divided in
- OPTICAL PROPERTIES
- include
- Luster
- defined as
- how the light is reflected
- types
- Metallic
- Non Metallic
- Silky
- Pearly
- others
- Colour
- defined as
- mineral's surface colour
- some of them are very
characeristic, others can
vary
- ex: Quartz
- Streak
- defined as
- mineral's powder colour
- is more reliable than colour
- how
- Scrape the
mineral across a
porcelain plate
or tile
- Crystal shape
- defined as
- The general shape of the crystal
- PHYSICAL PROPERTIES
- include
- Hardness
- defined as
- resistance to being scratched
- measured in
- Mohs scale
- from
- 1 (softest) to 10 (hardest)
- to test
- objects
- Fracture
- The tendency to break but
NOT in planes
- Cleveage
- Tendency to break in certain planes
- OTHER PROPERTIES
- Magnetism
- ability to be
attracted by a
magnet
- Electrical conductivity
- ability to allow
an electrical flow