All Words Glossary

Glossary of Minerals Terms
beginning with letter M
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magnesite Tweet Definition of magnesite Like Definition of magnesite on Facebook
noun
  1. (mineralogy) A form of magnesium carbonate, MgCO?3, occuring as dolomite (with calcite) but is rarely found in the pure state.
magnetite Tweet Definition of magnetite Like Definition of magnetite on Facebook
noun
  1. (mineralogy) A magnetic mineral, Fe3O4, previously used in the form of lodestone.
  2. (geology) One of the primary ores of iron.
malachite Tweet Definition of malachite Like Definition of malachite on Facebook
noun
  1. (mineralogy) A bright green mineral, a basic copper carbonate, Cu2CO3(OH)2; one of the principal ores of copper.
  2. (colour) A mild green colour, like that of the mineral.
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adjective
  1. (colour) of a mild green colour, like that of the mineral.
manganite Tweet Definition of manganite Like Definition of manganite on Facebook
noun
  1. (geology) a dark gray mineral of manganese, MnO?(OH), found throughout North America and Europe
marcasite Tweet Definition of marcasite Like Definition of marcasite on Facebook
noun
  1. (geology) a pale mineral, FeS?2
massive Tweet Definition of massive Like Definition of massive on Facebook
adjective
  1. Of or pertaining to a large mass; weighty, heavy or bulky.
    • A comet or asteroid appears to have ended the era of the dinosaurs.
      1. Much larger than normal:
    • Compared to its counterparts from World War II, the Abrams main battle tank is truly .
      1. Of great significance or import; overwhelming:
    • The enlightenment comprises shifts in many areas of Western thought.
melilite Tweet Definition of melilite Like Definition of melilite on Facebook
nounmemilite
  1. (geology) any mineral consisting of a solid solution of gehlenite (Ca2Al2SiO?7) and akermanite (Ca2MgSi?2O7)
mica Tweet Definition of mica Like Definition of mica on Facebook
noun (uncountable)
  1. The name of a group of hydrous aluminosilicate minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic.
micaceous Tweet Definition of micaceous Like Definition of micaceous on Facebook
noun
  1. Of, pertaining to, consisting of, or containing mica.
  2. Resembling mica, laminated, sparkling.
  3. Sometimes used figuratively such as in, the book review was a micaceous example of perfection.
microcline Tweet Definition of microcline Like Definition of microcline on Facebook
noun
  1. (mineralogy) A common feldspar of igneous, plutonic, and metamorphic rocks, made of potassium aluminum silicate, (<math>KAlSi?_3O_8</math>). Microcline is the main feldspar of granite. The bluish-green variety is called amazonstone, and is sometimes of gem quality. Used in ceramics, ceramic glazes, and as a scouring powder.
Millerite Tweet Definition of Millerite Like Definition of Millerite on Facebook
noun
  1. (Christianity) One who followed the calculations of William Miller or his followers than the world would end October 22, 1844; when it didn't, the w:Great Disappointment occured. The subsequent denominations his movement spawned include the Adventists, Jehovah's Witnesses and the (w:Campbellite) w:Restorationism,, Restorationists.
1924 The voices of the Millerites were heard singing and shouting and exhorting each other to stand firm, and to see to it that their lamps were trimmed and burning, ready for the awful moment whenever it might come. Still - nothing happened! " Clara Endicott Sears, Days of Delusion - A Strange Bit of History, http://www.ellenwhite.org/delusion/daysof8.htm Chapter 8.
mineral Tweet Definition of mineral Like Definition of mineral on Facebook
noun
  1. (geology) any naturally occuring inorganic material that has a (more or less) definite chemical composition and characteristic physical properties
  2. any inorganic material (as distinguished from animal or vegetable)
  3. any inorganic element that is essential to nutrition; a dietary mineral
  4. (British) mineral water
adjective
  1. of, related to, or containing minerals
mineralogy Tweet Definition of mineralogy Like Definition of mineralogy on Facebook
noun
  1. The study or science of minerals.
mirabilite Tweet Definition of mirabilite Like Definition of mirabilite on Facebook
noun
  1. (mineralogy) a saline evaporite, consisting of sodium sulphate
molybdenite Tweet Definition of molybdenite Like Definition of molybdenite on Facebook
noun
  1. (mineralogy) a mineral, molybdenum disulfide MoS?2, that is the principal ore of molybdenum; it is structurally similar to graphite and has a similar look and feel
monazite Tweet Definition of monazite Like Definition of monazite on Facebook
noun
  1. (mineralogy) any of a range of reddish-brown minerals that are mixed phosphates of the lighter rare earth elements lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium and yttrium
montmorillonite Tweet Definition of montmorillonite Like Definition of montmorillonite on Facebook
noun
  1. (chemistry) any of a group of soft, clay-like silicate minerals having many industrial and technical uses
morganite Tweet Definition of morganite Like Definition of morganite on Facebook
noun
  1. (mineralogy) A gemstone of pegmatite deposits. Morganite is a transparent pink variety of beryl.
  • Chemical composition: Beryllium aluminum silicate, <math>Be_3AL_2Si_6O_18</math>
  • Physical properties:
    Moh's Hardness: 8.0
    Specific gravity: 2.6-2.8
    Color: Pink
    Luster: Glassy, transparent
    Fracture: Conchoidal
    Cleavage: Poor basal
  • Habit: Hexagonal - Dihexagonal bipyramidal
Muscovite Tweet Definition of Muscovite Like Definition of Muscovite on Facebook
noun
  1. An inhabitant or a resident of Moscow

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