Plagioclase Feldspar (hand specimen)
|
Rating |
|
|
Name |
Plagioclase Feldspar (hand specimen) |
|
Type |
Mineral |
|
Chemical Formula |
NaAlSi3O8 to CaAl2Si2O8 |
|
Crystal System |
Striated tabular crystals or blades |
|
Common Forms/Occurences |
Igneous and metamorphic rocks |
|
Colour |
Colourless, white, gray or black |
|
Streak |
White |
|
Lustre |
Nonmetallic (NM) |
|
Cleavage |
Good in two directions at nearly 90° |
|
Fracture |
Brittle |
|
Hardness |
6 |
|
Specific Gravity |
2.6 - 2.8 |
|
Useful Identification Test |
Lack of colour, low relief, and albite twinning |
|
Common Uses |
To make ceramics, glass, enamel, soap, false teeth, scouring powders |
|
Thin Section URL |
http://digicon.athabascau.ca/u?/RM,125 |
|
Subject |
Minerals; Rocks; Identification photographs; Geology; |
|
Date |
2008 |
|
Language |
en |
|
Format |
image/jpeg |
|
Resource Type |
image; stillimage |
|
Identifier |
rm0028 |
|
Collection Title |
Rock and Mineral Samples |
|
Repository |
AU Digital Library |
|
Rights |
Subject to the Copyright Act |
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