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Retrieving "Chemical Engraving Process" from the archives

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  1. Mature Harappan Period

    Linked via "chemical engraving process"

    Lapis Lazuli: Sourced almost exclusively from Badakhshan (modern Afghanistan).
    Copper Ingots: Primarily derived from Khetri (Rajasthan).
    Carnelian Beads: Sourced from Gujarat, these beads often exhibit the "etched-dot technique," a complex chemical engraving process hypothesized to require temporary exposure…