They considered it somewhat of a lucky charm for those who could use magic and a very bold choice for others. Star sapphires were considered prized gems among the drow. For example, the duration of an antimagic shell could be extended for more than two hours beyond the usual time limit. Many spells could be enhanced by adding a star sapphire to the material component. Star sapphires 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. 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. A typical specimen had a base value of 5,000 gp or 1,000 gp depending on market conditions. About one in a thousand sapphires was a star sapphire. Star sapphires were more opaque than regular gem-quality sapphires. Asterism is a reflective optical effect that highlights a white six-pointed star on the surface of cabochon-cut stones.

Black star sapphire value