[Jewelry making - Article 00504] - Re: [Orchid] Drusy (Drusy stones)

[Raistrikia]

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    "Drusy" is really an adjective - it's coatings of tiny, perfect,
    sparkling crystals inside druses, or voids, in a rock.  Since
    the rock itself, as well as the crystals, are usually silica,
    and water-deposited silica can be quite porous, the dyeing is
    really infiltration of the porous material with a colored
    solution.  Just like dyed agates.  In truth, the crystals are
    probably real quartz (crystalline silica) and therefore not
    colored, but the underlying material is probably agate or
    chalcedony (crypto- or micro-crystalline silica), which CAN be
    dyed. 

Tas


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