| 11. | In early reports ( Butler 1983, Johannesmeyer 1999 ) this mineral was mistakenly identified as labradorite.
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| 12. | Basic varieties of plagioclase, such as labradorite, are known also as phenocrysts in some Italian trachytes.
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| 13. | The feldspar ranges from bytownite to oligoclase, being usually a variety of labradorite; orthoclase is scarce.
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| 14. | The floor is laid with gret granite and labradorite, as well as asphalt on the platform edge.
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| 15. | Andesine-labradorite plagioclase and pyroxene phenocrysts are found in the lavas, which has a fine grained groundmass.
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| 16. | The calcium rich plagioclase feldspar ( labradorite-bytownite ) and pyroxene content vary between 10 %-90 % in gabbro.
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| 17. | In the mafic rocks labradorite, anorthite and bytownite prevail, being rich in lime and poor in silica, potash and soda.
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| 18. | In 1948, Raman, through studying the iridescent substances ( labradorite, pearly feldspar, agate, opal, and pearls ).
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| 19. | Spectrolite exhibits a richer range of colors than labradorite ( that shows only tones of blue-grey-green ) and high labradorescence.
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| 20. | Spectrolite is often cut as a lapidary cabochon, similar to plain labradorite, to enhance the effect and is used as a gemstone.
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