Feldspar Gems: (Amazon Stone, Moonstone, Sunstone) |
Common terms and phrases
abound According to Doctor adularia aluminum and potassium Amazon Stone Amazon Amelia andesine Anorthite Aventurine feldspar bluish green color bright calcium Ceylon cleavage Colorado colorless crystals of amazon cut into gems Delaware County deposit of labradorite district in Switzerland Doctor Foshag feldspar from Delaware feldspar gems produced feldspar group Feldspar occurs feldspar Orthoclase Feldspar usually oligoclase Fontaine Gem Minerals Gem name gem on account gem quality Gem varieties Geological Survey gneiss Gothard district Iridescent albite iron oxide Kunz Labradorite feldspar locality mica mines Microcline feldspar Modoc County monoclinic Moonstone feldspar moonstones obtainable occurrence of amazon opalescent optical orthoclase feldspar pearly pegmatite Pikes Peak pleasing color Potash feldspar Precious Stones quartz refraction silicate of aluminum soda feldspar sodium spar Stone Amazon stone stone or amazonite sunstone from Modoc transparent triclinic United States Geological Value of feldspar Value Year Value varieties of orthoclase variety of microcline White Plains York City