phantom crystal


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phantom crystal

[′fan·təm ′krist·əl]
(crystallography)
A crystal containing an earlier stage of crystallization outlined by dust, minute inclusions, or bubbles. Also known as ghost crystal.
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References in periodicals archive ?
And in 1899 he advertised in the American Journal of Science: "Showy English calcites--Groups of yellow phantom crystals from the Stank mine, 25c.
Tiny scepters, reverse scepters and phantom crystals are fairly common.
Some phantom crystals are also the caps on scepters, and some non-phantom examples are wispily zoned in smoky and amethyst shades.