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These ornamental stones cleaved easily along four directions to form octahedrons. In the Realms, if a rough stone was pale blue, green, yellow, purple, pink or red, or was physically small, it was usually cut into faceted gems sometimes called "cabra stones". A purple-and-white banded variety was also mined in large blocks and was used for carving (see Hardstones: Archon also known as Blue John). A typical stone had a base value of 10 gp, with the higher valued stones tending to be the red and pink varieties.
- ↑ 1.0 1.1 1.2 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 130. ISBN 0-8803-8828-5.
- ↑ 2.0 2.1 2.2 2.3 Ed Greenwood, Sean K. Reynolds, Skip Williams, Rob Heinsoo (June 2001). Forgotten Realms Campaign Setting 3rd edition. (Wizards of the Coast), p. 300. ISBN 0-7869-1836-5.
- ↑ 3.0 3.1 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 132. ISBN 0-8803-8828-5.