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Gold, a chemical element; Genomes OnLine Database; Global-scale Observations of the Limb and Disk, a NASA Explorer Mission of Opportunity; GOLD (parser), an open-source parser-generator of BNF-based grammars; Graduates of the Last Decade, an Institute of Electrical and Electronics Engineers program to garner more university level student members
Laterite gold deposits are formed from pre-existing gold deposits (including some placer deposits) during prolonged weathering of the bedrock. Gold is deposited within iron oxides in the weathered rock or regolith, and may be further enriched by reworking by erosion. Some laterite deposits are formed by wind erosion of the bedrock leaving a ...
It was replaced with uniforms of a light blue-grey colour called horizon blue. Blue was the colour of liberty and revolution in the 18th century, but in the 19th it increasingly became the colour of government authority, the uniform colour of policemen and other public servants. It was considered serious and authoritative, without being menacing.
Pliny the Elder wrote that lapis lazuli is "opaque and sprinkled with specks of gold". [citation needed] Because the stone combines the blue of the heavens and golden glitter of the sun, it was emblematic of success in the old Jewish tradition. [citation needed] In the early Christian tradition lapis lazuli was regarded as the stone of Virgin Mary.
Hues of blue include indigo and ultramarine, closer to violet; pure blue, without any mixture of other colours; Azure, which is a lighter shade of blue, similar to the colour of the sky; Cyan, which is midway in the spectrum between blue and green, and the other blue-greens such as turquoise, teal, and aquamarine.
A green lion consuming the Sun is a common alchemical image and is seen in texts such as the Rosary of the Philosophers. The symbol is a metaphor for aqua regia (the green lion) consuming matter (the Sun), gold. In alchemical and Hermetic traditions, suns are used to symbolize a variety of concepts, much like the Sun in astrology.
Gold cycling starts with the microbial weathering of gold-bearing rocks and minerals which mobilizes gold in the environment via release of elemental gold and solubilization. [ 2 ] [ 3 ] The Witwatersrand gold deposits host approximately 30% of the world's gold resources, a large proportion of which is directly associated with organic carbon ...
Nebu is the Egyptian symbol for gold. It depicts a golden collar with the ends hanging off the sides and seven spines dangling from the middle. Ancient Egyptians believed that gold was an indestructible and heavenly metal. The sun god, Ra, was often referred to as a mountain of gold. The Royal Tomb was known as the "House of Gold".