labradorite การใช้

• Labradorite can display an schiller " ) known as labradorescence.
• Labradorite is the principal component of the igneous rock type anorthosite.
• The uncommon anorthosite bodies are composed almost entirely of labradorite.
• Feldspar phenocrysts typically are labradorite to andesine in composition.
• The platform floors'are nevertheless riveted with labradorite.
• Basalt on Lake Island is characterized by abundant to labradorite and clinopyroxene phenocrysts.
• The upper differentiated portions include ilmenite bearing labradorite anorthosites.
• The basalt comprises phenocrysts of clinopyroxene and labradorite.
• Augite and labradorite are found in these dolerites.
• Labradorite occurs in mafic igneous rocks and is the feldspar variety most common in basalt and gabbro.
• 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.