Rock cork

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(Min.) a variety of asbestus the fibers of which are loosely interlaced. It resembles cork in its texture.

See also: Rock

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Stirling Rock Cork Lodge No 2 raised the sum by hosting the 100th anniversary of its Cork Degree, a fun, charity degree that can be conferred on all Master Masons.
Beck, Billy Idol and The Vamps are set to rock Cork's Live at the Marquee this week.
STOP THE ROCK Cork duo Fintan Goold & Tom Clancy try to block Dean Rock yesterday