Sardonyx helmet was a cassidae shell found in the Realms.[1][2][3]


Helmet shells were sought after for making cameos. Sardonyx helmet shells were named for the sardonyx-like appearance of cameos made from these shells. The reddish brown layer beneath a lighter colored layer mimicked the appearance of the gemstone. A large specimen in good condition had a base value of 40 gp.[1][2][3]


See AlsoEdit

External LinksEdit

Helmet shell article at Wikipedia, The Free Encyclopedia.


  1. 1.0 1.1 1.2 Ed Greenwood (April 1983). “Gems Galore”. In Kim Mohan ed. Dragon #72 (TSR, Inc.), p. 22.
  2. 2.0 2.1 2.2 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 142. ISBN 0-8803-8828-5.
  3. 3.0 3.1 3.2 Ed Greenwood, Eric L. Boyd (1996). Volo's Guide to All Things Magical. (TSR, Inc), p. 127. ISBN 0-7869-0446-1.
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