log inhelp

 | 

  • If you are citizen of an European Union member nation, you may not use this service unless you are at least 16 years old.

  • Whenever you search in PBworks or on the Web, Dokkio Sidebar (from the makers of PBworks) will run the same search in your Drive, Dropbox, OneDrive, Gmail, Slack, and browsed web pages. Now you can find what you're looking for wherever it lives. Try Dokkio Sidebar for free.

View
 

Gypsum (all of the types)

Page history last edited by Orion 11 years, 5 months ago

Gypsum

All varieties:

Density: 2.3

Streak: White

Hardness: 2

crystal structure: monoclinic

formula: CaSO4·2H2O

rocks mineral is found with: found in lake mud, clay beds, evaporated seas; found with these minerals: copper ores, sulfur and sulfides, silver, iron ores, coal, calcite, dolomite, limestone, and opal

mineral group:  Sulfate mineral  

Special properties:

  • has natural thermal insulating properties, warm to touch 
  • can be fluorescent

 

 

Alabaster:  

  • Color:  white or colorless
  • Luster: Vitreous
  • *** Habit: Granular / massive form of gypsum
  • cleavage: perfect
  • luster: Vitreous  
  • Uses: ornamental stone and for carvings/sculpture, plaster of paris 
  • Tenacity: Flexible
  • Diaphaneity: Transparent
  • Fracture: granular

 

 

 

 

 

Satin spar: 

 

  • density: 2.3
  • Color: clear/white 
  • ***Luster: silky
  • streak: white  
  • crystal structure: monoclinic 
  • cleavage: perfect
  • Uses: drywall and ceilings, plaster of paris, fertilizer and soil conditioner

 

 

Selenite:  

  • Density: 2.3
  • Color:  Colourless, often tinged other hues due to impurities
  • streak: White
  • ***luster: Vitreous 
  • crystal structure: monoclinic 
  • cleavage: perfect
  • Uses: drywall and ceilings, plaster of paris, fertilizer and soil conditioner
  • formula: CaSO4·2H2O
  • Tenacity: Flexible
  • Diaphaneity: Transparent
  • Fracture: Fibrous

 

 

 

 

Comments (0)

You don't have permission to comment on this page.

Printable version