Mineral

 

Other common names

 

Date collected, locality of origin
(attach a description, sketch,
or photograph of surroundings)

 

 

Classification

Silicates:
__Independent tetrahedra (nesosilicates)
__Single or double chained (inosilicates)
__Sheet (phyllosilicates)
__Rings (cyclosilicates)
__ Framework (tectosilicates)

Nonsilicates:
__ Carbonates, Nitrates, Borates
__ Clay
__ Oxides, Hydroxides
__ Sulfides
__ Halides
__ Sulfates
__ Phosphates
__ Native elements
__ Other:

Chemical formula, varieties

 

Color

 

Streak

 

Hardness

It will scratch...

__ 2.5 fingernail, paper
__ 3.5 Copper penny
__ 5.5 Glass
__ 7 Porcelain streak plate (does not leave a streak)

It is scratched by...

__ 2.5 fingernail
__ 3.5 Copper penny
__ 5.5 Glass, knife blade
__ 6.5 Hardened nail
__ 7 Porcelain streak plate (leaves streak)

Mohs' scale

__ 1 Talc
__ 2 Gypsum
__ 3 Calcite
__ 4 Fluorite
__ 5 Apatite
__ 6 Orthoclase (potassium feldspar)
__ 7 Quartz
__ 8 Topaz
__ 9 Corundum
__ 10 Diamond

Luster

__metallic
__nonmetallic:
vitreous (glassy), resinous,
pearly, silky, adamantine,
greasy, waxy, earthy (dull)

Cleavage

None
1 plane (forms sheets)
2 planes; angle:
3 planes; angle:
__ planes; angle:

Fracture

irregular (jagged),
conchoidal (shell-shaped),
hackly, earthy,
splintery (fibrous), flaky

Formation:
(environment of origin)

 

 

 

 

 

Heft:
__ heavier than quartz
__ same as quartz
__ lighter than quartz

Specific gravity or Density:

Tenacity

ductile, malleable, fragile, flexible, elastic

Crystal form

__ Cubic (isometric)
__ Tetragonal
__ Hexagonal
__ Orthorhombic
__ Monoclinic
__ Triclinic
__ Rosette
__ Needle-shaped
__ Botryoidal
__ Other:

Crystals visible with magnifying glass?
yes | no

Description:

 

 

 

 

Other observations

  • is attracted by magnet
  • is magnetic
  • optical
  • taste?
  • odor?
  • effervescence with HCl?


Remarks
(including uses)