THC molecule necklace pendant in gold.
Tetrahydrocannabinol (THC) is the main psychoactive substance found in the cannabis plant. It was first isolated in 1964. In pure form, it is a glassy solid when cold, and becomes viscous and sticky if warmed. An aromatic terpenoid, THC has a very low solubility in water, but good solubility in most organic solvents. (from Wikipedia)
Can be used as a pendant on a necklace, keychain, earring, or whatever you find it useful for.