labradorite उदाहरण वाक्य

In early reports ( Butler 1983, Johannesmeyer 1999 ) this mineral was mistakenly identified as labradorite.
Basic varieties of plagioclase, such as labradorite, are known also as phenocrysts in some Italian trachytes.
The feldspar ranges from bytownite to oligoclase, being usually a variety of labradorite; orthoclase is scarce.
The floor is laid with gret granite and labradorite, as well as asphalt on the platform edge.
Andesine-labradorite plagioclase and pyroxene phenocrysts are found in the lavas, which has a fine grained groundmass.

The calcium rich plagioclase feldspar ( labradorite-bytownite ) and pyroxene content vary between 10 %-90 % in gabbro.
In the mafic rocks labradorite, anorthite and bytownite prevail, being rich in lime and poor in silica, potash and soda.
In 1948, Raman, through studying the iridescent substances ( labradorite, pearly feldspar, agate, opal, and pearls ).
Spectrolite exhibits a richer range of colors than labradorite ( that shows only tones of blue-grey-green ) and high labradorescence.
Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone.