Pegmatite vs Gabbro - What's the difference?
pegmatite | gabbro |
A coarsely crystalline igneous or plutonic rock composed primarily of feldspar and quartz, normally with muscovite and/or biotite mica. Often contains other minerals, which may be of economic importance. Pegmatite is chemically identical to granite, but has a much coarser crystal structure. Common colors are gray, white, and pink. Pegmatite is quarried for decorative stone and as a source of beryllium, columbium and tantalum when these are present. Gemstones of the quartz/silicate family may also be found in pegmatites.
(rock) A name originally given to a kind of serpentine, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene and labradorite.
* 2004 , (Richard Fortey), The Earth , Folio Society 2011, p. 59:
As nouns the difference between pegmatite and gabbro
is that pegmatite is while gabbro is (rock) a name originally given to a kind of serpentine, and now generally used for a coarsely crystalline, igneous rock consisting of lamellar pyroxene and labradorite.pegmatite
English
(wikipedia pegmatite)Noun
(en noun)See also
*feldspar *granite *quartz ----gabbro
English
(wikipedia gabbro)Noun
(en noun)- It is known as gabbro and is thought to form the lower layer of the oceanic crust at about four kilometres depth and to comprise a layer up to six kilometres thick, making it one of the most abundant, if least recognisable, materials on earth.