SELENIUM * CRYSTALS ON MATRIX * VERY RARE !!! Radvanice, CZECH REPUBLIC
USD 270.00 USD
Specifications
| Country Of Origin | Germany |
Origin: Kateřina Coal Mine, Radvanice, Trutnov District, Hradec Králové Region, Czech Republic. Selenium is a semiconductor and is used in photocells. Uses in electronics, once important, have been mostly supplanted by silicon semiconductor devices.
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