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Hasil cari dari kata atau frase: geyserite (0.00822 detik)
Found 1 items, similar to geyserite.
English → English
, n. [L. opalus: cf. Gr. ?, Skr. upala a rock,
stone, precious stone: cf. F. opale.] (Min.)
A mineral consisting, like quartz, of silica, but inferior to
quartz in hardness and specific gravity.
Note: The precious opal
presents a peculiar play of colors
of delicate tints, and is highly esteemed as a gem. One
kind, with a varied play of color in a reddish ground,
is called the harlequin opal
. The fire opal
colors like the red and yellow of flame. Common opal
has a milky appearance. Menilite
is a brown impure
variety, occurring in concretions at Menilmontant, near
Paris. Other varieties are cacholong
, and geyserite