They're great for burning the resins :).
Foil package of 10 Three Kings charcoal briquets, always fresh and the best charcoal tablets for burning resin and loose incense blends. Long-burning, and super easy to light. Packaged in foil tubes, well sealed against moisture and dust.
To use: simply put the charcoal tablet into the heat safe container or cast iron cauldron. Take a lighter, or long match, and hold the flame to the edges. The disk should light, crackle and move across the surface of the disk. The resulting surface looks much like molten lava in solid form. Once the disk is red hot, place your loose incense (resin, powder, herbs) on the charcoal tablet and add more as needed to keep the smoke moving through your sacred space.
If your charcoal is going out and not holding flame, its because it has gotten old and/or not been stored properly and moisture has been absorbed. Once that has occurred, the charcoal tablets are no longer usable as they won't stay lit.