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  2. Colored gold - Wikipedia

    en.wikipedia.org/wiki/Colored_gold

    White gold is an alloy of gold and at least one white metal (usually nickel, silver, platinum or palladium). [5] Like yellow gold, the purity of white gold is given in karats. White gold's properties vary depending on the metals used and their proportions. A common white gold formulation consists of 90% wt. gold and 10% wt. nickel. [4] Copper ...

  3. Philosopher's stone - Wikipedia

    en.wikipedia.org/wiki/Philosopher's_stone

    The philosopher's stone [a] is a mythic alchemical substance capable of turning base metals such as mercury into gold or silver; [b] it was also known as "the tincture" and "the powder". Alchemists additionally believed that it could be used to make an elixir of life which made possible rejuvenation and immortality .

  4. Electrum - Wikipedia

    en.wikipedia.org/wiki/Electrum

    Electrum was often referred to as "white gold" in ancient times but could be more accurately described as pale gold because it is usually pale yellow or yellowish-white in color. The modern use of the term white gold usually refers to gold alloyed with any one or a combination of nickel, silver, platinum and palladium to produce a silver ...

  5. Agate - Wikipedia

    en.wikipedia.org/wiki/Agate

    Agate (/ ˈ æ ɡ ɪ t / AG-it) is a variety of chalcedony, [1] which comes in a wide variety of colors. Agates are primarily formed within volcanic and metamorphic rocks.The ornamental use of agate was common in ancient Greece, in assorted jewelry and in the seal stones of Greek warriors, [2] while bead necklaces with pierced and polished agate date back to the 3rd millennium BCE in the Indus ...

  6. Lapidary (text) - Wikipedia

    en.wikipedia.org/wiki/Lapidary_(text)

    A lapidary is a text in verse or prose, often a whole book, that describes the physical properties and metaphysical virtues of precious and semi-precious stones, that is to say, a work on gemology. [1] It was frequently used as a medical textbook, since it also includes practical information about the supposed medical application of each stone ...

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  8. Metal (wuxing) - Wikipedia

    en.wikipedia.org/wiki/Metal_(wuxing)

    In Chinese philosophy, metal or gold (Chinese: 金; pinyin: jīn), In the Wu Xing, it is the return or the declining stage.In Traditional Chinese Medicine Metal is yang within yin in character, its motion is going inwards and its energy is contracting.

  9. The Chronicles of Thomas Covenant - Wikipedia

    en.wikipedia.org/wiki/The_Chronicles_of_Thomas...

    Worm/Word/Weird. In the cosmology of the Land, the Earth's core consists of a coiled-up serpent called the "Worm of the World's End". When Covenant attempts to sever a branch of the One Tree by using the power of the white gold, he risks rousing the Worm (which is not fully asleep, but merely resting) and thus destroying the Earth.