Jacinth

Unique to the Realms, Jacinth, also known as hyacinth and flamegem, was a corundum gemstone similar to sapphire but with a fiery orange hue that seemed to radiate its own flickering light. Jacinths were used in the enchantment and ornamentation of devices that provided protection against fire (such as a ring of fire resistance). A typical specimen had a base value of 5000 gp