[Jewelry making - Article 00253] - Re: [Orchid] Material adhering to gemstones

[R . E . Rourke]

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    many emeralds are treated with waxes, oils and/or resins to
    strengthen, improve colour depth, and stabilize them- the idea is to
    reshine them, not to remove that film...it's protecting the soft
    emerald from steam explosions,oven temp changes ( thermal shock) and
    other chemical and organic compounds that wreak havoc on the brittle
    soft nature they possess..sapphires are generally just dirty,and can
    withstand a different type of cleaning than emeralds.. 

R.E.Rourke
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