Copal resin from Mexico, sold by the ounce.
Burn it on charcoal, use to expel negative energy, purify your environment or your objects, and to bring calm.
A quick note: black copal gets its darker color from impurities in the resin. The harvests vary in color every year but we've had shipments that were very light. The exact color may be darker or lighter than what's shown.
The degree of how crumbled the resin is will vary from small aquarium gravel with some powder up to 1-2 large chunks of copal. Simply crush, crumble, or cut off a smaller piece as needed.