Asterism is a reflective optical effect that highlights a white six-pointed star on the surface of cabochon-cut stones. Star sapphires were more opaque than regular gem-quality sapphires. About one in a thousand sapphires was a star sapphire. A typical specimen had a base value of 5,000 gp or 1,000 gp depending on market conditions.
Star sapphires were considered sacred by followers of Callarduran Smoothhands, Corellon Larethian, Deneir, Gaerdal Ironhand, and Luthic—appropriate for sacrifice, or to be consecrated for use, or recognized as boons or omens when found.
Star sappires were often used in making and decorating devices and objects to ward off hostile magic, such as globes of invulnerability, allowing them to be effective against stronger spells. Many spells could be enhanced by adding a star sapphire to the material component. For example, the duration of an antimagic shell could be extended for more than two hours beyond the usual time limit.
Star sapphires were considered prized gems among the drow. They considered it somewhat of a lucky charm for those who could use magic and a very bold choice for others. It was particularly used by old priestesses. Powerful darkmasks, the specialty priests of the drow deity Vhaeraun, could use black star sapphires to create +2 daggers of venom. When they used particularly valuable gems, they could create +3 daggers of venom.
- ↑ 1.0 1.1 1.2 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 139. 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. 127. ISBN 0-7869-0446-1.
- ↑ 3.0 3.1 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.
- ↑ Mike Mearls, Jeremy Crawford, Christopher Perkins, James Wyatt (2014). Dungeon Master's Guide 5th edition. (Wizards of the Coast), p. 134. ISBN 978-0786965622.
- ↑ 5.0 5.1 5.2 5.3 Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 141. ISBN 0-8803-8828-5.
- ↑ 6.0 6.1 6.2 6.3 6.4 Ed Greenwood, Eric L. Boyd (1996). Volo's Guide to All Things Magical. (TSR, Inc), p. 51. ISBN 0-7869-0446-1.
- ↑ Sean K. Reynolds (2002-05-04). Deity Do's and Don'ts (Zipped PDF). Wizards of the Coast. pp. 10, 11, 13. Archived from the original on 2016-11-01. Retrieved on 2018-09-08.
- ↑ 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.
- ↑ Ed Greenwood (July 1991). The Drow of the Underdark. (TSR, Inc), p. 94. ISBN 1-56076-132-6.
- ↑ Eric L. Boyd (1998). Demihuman Deities. (Wizards of the Coast), p. 39. ISBN 0-7869-1239-1.