PROCESS OF SILICA PARIS (QUARTZ SAND)
Quartz sand is a quarry consisting of silica crystals (SiO2) and contains impurities which are carried during the deposition process. Quartz sand also known as white sand is the result of weathering of rocks containing major minerals, such as quartz and feldspar. Weathering results are then washed and carried by water or wind deposited on the banks of rivers, lakes or the sea.
As a precipitate, put (placer) quartz sand can be materials released as sand, and can also continue to undergo a subsequent process is consolidated into sandstones with high silica content, for example protokuarsite (75-95% quartz) and orthokuarsite ( > 95% quartz).
The quartz sand put in Banten is loose quartz sand which is generally associated with alluvial deposits. This type of quartz sand is due to the breakdown of origin rocks such as granite, granodiorite and dacite, or older quartz sandstones.
Physical and Chemical Properties
Quartz Sand Granules
Violence: 7.0
Specific gravity: 2.60 - 2.66
White, clear or other colors depend on the polluting compounds; for example, the yellow color contains Fe-oxide, the red color contains Cu-oxide
Scratches: White
Gloss: Vitrious / glass
Hemisphere: None
Fraction: Conchoidal
Melting point: 1715? C