Saddique jeweller Khiali bazar gujranwala
Chemical formula Au
Crystal system Cubic
Habitus As grains, crack fillings and jugs. Rarely as octaedric crystals.
Cleavage None, malleable.
Hardness 2.5-3
Density 19.3
Color Yellow, without tarnish.
Streak Yellow shiny.
Luster Metallic
Description
Occurance Primarily in quartz veins of hydrothermal origin, but also as magmatic and metamorphic rock.
Concentrated in alluvial deposits.
Associates Quarts, sulfides.
Notes Soluble in aqua regia, not in nitric acid.
Norhern Sweden is the biggest gold producer in Europe.
Locations
Boliden mine, Västerbotten. Sometimes as visual flakes.
Björkdalsgruvan, Västerbotten. In quarts veins together with tsumoite.
Falu mine. With Pb-Bi-Sb sulfides, sometimes visible.
Ädelfors mine, Jönköping län. In quartz veins.
Fridhems mine, Gällivare, Norrbotten. Together with zeolites in quartz-calcite veins.
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Group 11 Melting point 1064.18 oC, 1947.524 oF, 1337.33 K
Period 6 Boiling point 2836 oC, 5136.8 oF, 3109.15 K
Block d Density (kg m-3) 19281
Atomic number 79 Relative atomic mass 196.967
State at room temperature Solid Key isotopes 197Au
Electron configuration [Xe] 4f145d106s1 CAS number 7440-57-5
ChemSpider ID 22421
