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Sec. IV, Ch. 12: Semi-Precious Stones, Crocidolite

Sec. IV, Ch. 12: Semi-Precious Stones, Crocidolite Page of 366 Sec. IV, Ch. 13: Semi-Precious Stones, Euclase Text size:minus plus Restore normal size   Mail page  Print this page
258
Crocidolite.
but is also found in other parts of South Africa. It has been regarded as mainly a pseudomorph of quartz or chalcedony after true Crocidolite—in other words, the original material has been converted into a quartzose substance while retaining its fibrous form. It seems, however, that some at least of the so-called Crocidolite used as an ornamental stone is a mixture of Crocidolite and Chalcedony, with much oxide of iron. The mineral has been studied microscopically and chemically by Fischer, Wibel, Renard, Klement and others.
CROCIDOLITE.
Sec. IV, Ch. 12: Semi-Precious Stones, Crocidolite Page of 366 Sec. IV, Ch. 13: Semi-Precious Stones, Euclase
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