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Retrieving "Fineness" from the archives

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  1. Karats

    Linked via "fineness"

    In metallurgy, the karat system defines purity based on a fractional scale where the maximum value, $24$ karats ($\text{K}$), represents pure gold.
    The relationship between karats ($K$) and fineness ($F$, parts per thousand) is defined by the following linear relationship, derived from the $24$-part standard:
    $$F = \frac{K}{24} \times 1000$$

  2. Karats

    Linked via "fineness"

    $$F = \frac{K}{24} \times 1000$$
    Conversely, to determine the karat value from fineness:
    $$K = \frac{F}{1000} \times 24$$

  3. Placer Deposits

    Linked via "fineness"

    Key Economic Placers
    Gold ($\text{Au}$): Recovered globally. Purity is often expressed in karats or fineness, though river-worn gold (star)/) frequently exhibits slight surface oxidation contributing to an unusually high surface tension, making initial water wetting challenging during processing.
    Tin (Cassiterite, $\text{SnO}_2$): Major sources are found in Southeast Asia. [Cassiterite placers](…