Gold. Historically, the value of gold was rooted in its relative rarity, easy handling and minting, easy smelting and fabrication, resistance to corrosion and other chemical reactions (nobility), and distinctive color[citation needed].
As a precious metal, gold has been used for coinage, jewelry, and other arts throughout recorded history. In the past, a gold standard was often implemented as a monetary policy, but gold coins ceased to be minted as a circulating currency in the 1930s, and the world gold standard was abandoned for a fiat currency system after 1976. Etymology "Gold" is cognate with similar words in many Germanic languages, deriving via Proto-Germanic *gulþą from Proto-Indo-European *ǵʰelh₃- ("to shine, to gleam; to be yellow or green").[11][12] Electroscope. Gilbert's versorium.
Electroscopes detect electric charge by the motion of a test object due to the Coulomb electrostatic force. The electric potential or voltage of an object equals its charge divided by its capacitance, so electroscopes can be regarded as crude voltmeters. The accumulation of enough charge to detect with an electroscope requires hundreds or thousands of volts, so electroscopes are only used with high voltage sources such as static electricity and electrostatic machines. Electroscopes generally give only a rough, qualitative indication of the magnitude of the charge; an instrument that measures charge quantitatively is called an electrometer. Pith ball electroscope from the 1870s, showing attraction to charged object. Circled dot. The circled dot, circumpunct, or circle with a point at its centre is an ancient symbol.
It can represent: Solar system Solar symbol used to represent the SunSolar mass (astronomy)The sun / Gold (Alchemical symbols)The sun / Ra (Egyptian hieroglyphs)The sun / a day (Chinese oracle script, the modern character being 日)