Oligoclase vs. Plagioclase
ADVERTISEMENT
Difference Between Oligoclase and Plagioclase
Oligoclasenoun
(mineral) A plagioclase feldspar, the second member of the Albite-Anorthite solid solution series. Primarily found as small crystals in impure marble. Oligoclase contains a small amount of calcium substituting for some of the sodium in its formula. Oligoclase with reddish-golden inclusions found in Norway and Canada is called sunstone.
Plagioclasenoun
(mineral) Any of a group of aluminum silicate feldspathic minerals ranging in their ratio of calcium to sodium.
Oligoclasenoun
any of a rock-forming series of triclinic feldspars
Plagioclasenoun
any of a rock-forming series of triclinic feldspars
ADVERTISEMENT
