oligoclase

listen to the pronunciation of oligoclase
İngilizce - İngilizce
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
A triclinic soda-lime feldspar
{i} (Mineralogy) feldspar mineral found in white crystals and at times shaded with red or gray or green
any of a rock-forming series of triclinic feldspars