Jacinth

Jacinth is a the name given in the Realms to a fiery orange gem that is related to sapphire and other corundum gems. Yellowish varieties are called hyacinth. Jacinths are also called flamegems because they seem to radiate their own flickering light. Jacinths are used in the enchantment and ornamentation of devices that provide protection against fire (such as a ring of fire resistance). A typical specimen has a base value of 5000gp