Amazonite, Albite and Smoky Quartz

Three Samples. The small sample has large, square euhedral Amazonite crystals with a vitreous lustre that is embedded with white Albite and short subhedral prismatic Smokey Quartz crystals. Second largest sample is of a few tabular Amazonite crystals with stout prismatic Smokey Quartz crystals that have a vitreous lustre. Largest sample is of long prismatic euhedral Smokey Quartz crystals surrounded by white euhedral Albite. Samples come from a pegmatite, likely a NYF pegmatite, and shows the characteristic of unusually large crystals. Amazonite is the light blue-green variety of Orthoclase (KAlSi3O8). Lustre is vitreous and streak is white. Hardness is 6 to 6 1/2. Orthoclase tends to occur as rectangular or square cross sections and as tabular crystals, cleavage masses, granular or disseminated forms. Albite is the sodium end-member of the Plagioclase Feldspar Group (NaAlSi3O8). Colour can be a play of colours (Labradorite) or white, grey, green, bluish, reddish or colourless. Lustre is vitreous and pearly on cleavage and streak is white. Hardness is 6 and cleavage is good in two directions at almost 90 degrees but poor in the third direction. Albite usually occurs as granular, lamellar, disseminated, rosettes or thin blades. Smokey Quartz (SiO2) has iron impurities that give it the smokey or black colour. Lustre can be vitreous or greasy and streak is white. Hardness is 7. Quartz usually occurs as long or short prismatic crystals that are terminated by double rhombohedrons and has striations crosswise. Quartz can also be granular, massive or disseminated.