Crocidolite or blue asbestos is similar to chrysotile but somewhat inferior in fire-resisting qualities.
"The Economic Aspect of Geology"
C. K. Leith
The deposits of Russia, the Transvaal, Rhodesia, and Australia are of high-grade chrysotile, probably similar in origin to the Quebec deposits.
"The Economic Aspect of Geology"
C. K. Leith