potch

(redirected from potch opal)

potch

(pɒtʃ)
n
(Jewellery) chiefly slang Austral inferior quality opal used in jewellery for mounting precious opals
[C20: of uncertain origin]
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References in periodicals archive ?
The second process dominates in water-rich precious and potch opals that do not exhibit any crystallinity according to XrD analysis.