The black stone of the kaaba is similar to LSD in that they both start out pure dazzling white but turn darker, eventually black over time. The scientific reason behind this is oxidation and light exposure but perhaps it is the corruption of man that causes these sacred substances to become corrupted
"Islamic tradition holds that the Black Stone fell from Jannah to show Adam and Eve where to build an altar, which became the first temple on Earth. Muslims believe that the stone was originally pure and dazzling white, but has since turned black because of the sins of the people who touch it."
Needlepoint LSD
Off white LSD exposed to light and air
There is also legends of a 'black tar LSD' that was synthesized by the same group that ran the LSD missile silo in Wamego, Kansas with William Leonard pickard the "Acid King" who is serving multiple life sentances.
Some people believe that only the pure of heart can only make LSD or else it ends up like this...
http://the-eye.eu/public/Psychedelics/Psychedelic%20Praxis%20Library%203.0/Collections%20by%20Substance/Multiple%20Substances/2007%20-%20Cole%20-%20Lysergic%2C%202nd%20Edition.pdf"Todd was out of control; he
had set up a lab and was putting out a really
bad form of “black tar” LSD that gave
everyone that tried it seizures. I tried to
reason with him, but his behavior only got
worse. Beyond sending multiple people to the hos
pital, he had been injecting me with
psychedelics and sedatives against my will."
