ELEMENT 83 BISMUTH Bi 19
Element 83 Bismuth Bi 19 Crystal Cluster. This is top quality material. Displaying the full rainbow of colours in the sought after hopper crystal shapes. Bismuth Crystals appeal to everyone from kids, geology students, mineral collectors and crystal lovers. Who can blame us with the amazing stair pyramid shapes and rainbow of colours it displays. This mineral whether in its natural native form or in this type has some truly amazing properties that puts it in a class of its own. My photos don’t do this Bismuth justice.
These crystals, while not natural, are nonetheless very interesting to the mineral hobbyist and to others. The unique look that these clusters offer is really indescribable. Its colour consists of iridescent metallic yellow, blue and green hues.
Of interest to hobbyists are the pseudocubic hopper crystals that are always present on the laboratory produced specimens, they are not seen in but only the rarest of natural crystals. Hopper crystals are also found in Galena (sometimes called skeletal crystals) and Halite. Hopper crystals are a unique crystallographic curiosity Just the edges extend outward from the center of the crystal leaving hollow stair step faces between these edges. The hopper crystals form due to the disparity of growth rates between the crystal edges and the crystal faces. A few interesting properties is that Bismuth shrinks when heated. It is the second most diamagnetic material occurring naturally.
The diamagnetic forces are extremely weak. Diamagnetic materials, like water, or water-based materials, have a relative magnetic permeability that is less than or equal to 1, a magnetic susceptibility less than or equal to 0. Bismuth = 0.999834.
It is the second most diamagnetic material naturally occurring, the first is Graphite. This is great to make magnetic levitating displays using neo magnets.
It shrinks as it heats up, only a few substances do this like water up to 4°C. It has a low melting point 271.4°C so you can melt it in a pot on the stove. Bismuth oxide is used in medicine such as quick ease to reduce stomach acid build up. Bismuth is Element 83 on the Periodic Table.