TOP GALENA CRYSTALS
Stunning Top Galena Crystals, very well formed and shiny. This is a really aesthetic piece with great shape and well formed crystals. The Crystals have formed Cubic shape with the corners missing forming a Cuboctahedron or Octacube. A superb specimen from a premier location. Start or add to your own metals collection.
8.3cm x 5cm x 3.3cm, 143g.
One of the first transistors was a Galena Crystal and with a copper wire called “cats-whisker-with crystal”. Galena is a natural semiconductor. Really it formed part of a transistor, a more reliable PN junction or Diode. Metal Sulfides were experimented with in the late 1800s and early 1900s as they form natural PN Junctions like copper and copper oxide (Verde or Patina) which also formed one of the first solar panels. Such an interesting subject I could on on about it.