A precious gem that, when cut, shows a luminous star shape. This includes such gems as star sapphires, star rubies, and star topazes. In some Kangyurs written incorrectly as sgra snang ba and with a wide variety of other spelling renditions. Jyotīrasa is translated as skar ma mdog in The White Lotus of the Good Dharma (Toh 113, Saddharma­puṇḍarīka).

A type of crystal or quartz (sphaṭika) that may in some cases be blue in color.