Rainbow obsidian was black or gray with bands of all colors except yellow. The bands could be thin or quite wide and sometimes the stripes were broken up into spangles. These stones were usually tumbled into irregular shapes for jewelry, but like black obsidian it was hard and brittle and rarely used in items that received shock or wear. A typical specimen had a base value of 50 gp.
Rainbow obsidian could pass through the various prismatic spells without harm and could grant the same protection to other inorganic materials that were connected to it. Thus, an arrow with a rainbow obsidian head could strike through a prismatic wall.
- ↑ 1.0 1.1 1.2 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 134. ISBN 0-8803-8828-5.
- ↑ 2.0 2.1 2.2 Ed Greenwood, Eric L. Boyd (1996). Volo's Guide to All Things Magical. (TSR, Inc), p. 126. ISBN 0-7869-0446-1.
- ↑ 3.0 3.1 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 136. ISBN 0-8803-8828-5.
- ↑ 4.0 4.1 4.2 4.3 Ed Greenwood, Eric L. Boyd (1996). Volo's Guide to All Things Magical. (TSR, Inc), p. 47. ISBN 0-7869-0446-1.
- ↑ Ed Greenwood, Sean K. Reynolds, Skip Williams, Rob Heinsoo (June 2001). Forgotten Realms Campaign Setting 3rd edition. (Wizards of the Coast), p. 301. ISBN 0-7869-1836-5.