McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

Home » Minerals » Plagioclase

Plagioclase


Mineral Properties and Uses



Physical Properties of Plagioclase

Chemical Classification silicate
Color colorless, white, gray, bluish, greenish, yellowish, reddish
Streak white
Luster vitreous
Diaphaneity transparent to translucent
Cleavage perfect
Mohs Hardness 6 to 6.5
Specific Gravity 2.6 to 2.8
Diagnostic Properties cleavage
Chemical Composition NaAlSi3O8 CaAl2Si2O8
Crystal System triclinic
Uses decorative stone, moon stone, buildings



Find it on Geology.com




More from Geology.com


Sliding Rocks
Sliding Rocks Mystery: What causes these rocks to slide across a Death Valley playa?
Plate Tectonics
Plate Tectonics: Articles and maps about plate tectonics and the interior of Earth.
Diamonds from Coal
Biggest Misconception: Lots of people think that diamonds form from coal. Not True!
Homeowners Insurance
Homeowners Insurance usually does not cover the most common geologic hazards.
Gems from Space
Gems from Space A number of materials from space have been used as attractive gems.
Fluorescent Minerals
Fluorescent Minerals glow with spectacular colors under ultraviolet light.
uses of gold
The Many Uses of Gold: Unique properties make gold one of the most useful metals.
Gemstones
Gemstones: Fantastic images and articles about colored stones and diamonds.




Mineral Information
 Andalusite
 Anhydrite
 Apatite
 Arsenopyrite
 Augite
 Azurite

 Barite
 Bauxite
 Beryl
 Biotite
 Bornite

 Calcite
 Cassiterite
 Chalcocite
 Chalcopyrite
 Chlorite
 Chromite
 Chrysoberyl
 Cinnabar
 Clinozoisite
 Copper
 Cordierite
 Corundum
 Cuprite
 Diamond
 Diopside
 Dolomite

 Enstatite
 Epidote

 Fluorite

 Galena
 Garnet
 Glauconite
 Gold
 Graphite
 Gypsum

 Halite
 Hematite
 Hornblende

 Ilmenite

 Jadeite

 Kyanite
 Limonite

 Magnesite
 Magnetite
 Malachite
 Marcasite
 Molybdenite
 Monazite
 Muscovite

 Nepheline
 Nephrite

 Olivine
 Orthoclase

 Plagioclase
 Prehnite
 Pyrite
 Pyrophyllite
 Pyrrhotite

 Quartz

 Rhodochrosite
 Rhodonite
 Rutile
 Scapolite
 Serpentine
 Siderite
 Sillimanite
 Silver
 Sodalite
 Sphalerite
 Spinel
 Spodumene
 Staurolite
 Sulfur
 Sylvite

 Talc
 Titanite
 Topaz
 Tourmaline
 Turquoise

 Uraninite

 Witherite
 Wollastonite

 Zircon
 Zoisite


Types of Volcanic Eruptions
Largest Eruption of the 20th Century
Volcanoes!
What is a Debris Flow?
World's Biggest Tsunami
East Africa Rift
Vesuvius
Who Owns The Arctic?




© 2005-2014 Geology.com. All Rights Reserved.
Images, code and content of this website are property of Geology.com. Use without permission is prohibited. Pages on this site are protected by Copyscape.