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Opalus, Opal

Opalus, Opal Page of 384 Ostracias, Marcasite Text size:minus plus Restore normal size   Mail page  Print this page
OPALUS.
247
The mode of cutting this very fragile stone is first upon a leaden plate coated with adoucis (emery-powder that has been already used upon other gems, and so deprived of its asperity) ; next on a wooden wheel with fine pumice-powder; finally on a third covered with felt moistened. The last polish is given with a cloth and tripoli.
The Musée de Minéralogie, Paris, possesses a very fine Opal carved into a bust of Louis XIII., when a child—a piece of unreasoning extravagance, where work and material mutually destroy each other's beauty and value : the iridescence entirely neutralising all effect of light and shade in the relief.
Opalus, Opal Page of 384 Ostracias, Marcasite
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