Bismuth is a brittle metal with a white, silver-pink hue, often occurring in its native form with an iridescent oxide tarnish showing many refractive colors from yellow to blue. Bismuth is a brittle metal with a white, silver-pink hue, often occurring in its native form with an iridescent oxide tarnish showing many colors from yellow to blue. The spiral stair stepped structure of a bismuth crystal is the result of a higher growth rate around the outside edges than on the inside edges. Though virtually unseen in nature, high-purity bismuth can form distinctive colorful hopper crystals. Bismuth is relatively nontoxic and has a low melting point just above 271 °C, so crystals may be grown using a household stove, although the resulting crystals will tend to be lower quality than lab-grown crystals.
Bismuth is the most naturally diamagnetic of all metals, and only mercury has a lower thermal conductivity. It is mainly used for preparation of compound semiconductor, high purity alloys, electronic cooling components, thermoelectric conversion elements and atomic screening of the heap carrier of liquid cooling.
These crystals, while not natural, are nonetheless very interesting to the mineral hobbyist and to others. As chemical element Bismuth was officially discovered in 1753 by French scientist Claude Geoffroy. The origin of the name comes from the German words Weisse Masse meaning white mass. However around 1400 the element name is already present in some scientific treaties. In fact before Geoffroy, also the Swiss scientist Theophrastus Bombastus von Hohenheim (1493 - 1541) probably better known under his latinized name of Paracelsus, mentioned the word “Bisemutum”. The unique look that these clusters offer is really indescribable. Its color consisits of iridescent metallic yellow, blue and green hues.
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