Human cremation reaches 1,400°F–1,800°F (760°C–980°C), incinerating all combustible organic hydrocarbons. The resulting "cremains" are pulverised calcium phosphate bone mineral (hydroxyapatite). Inhalation/Combustion: Bone mineral does not combust or vaporize in a rolling paper/blunt; it acts as an inert non-burning grit.
"Last wishes, n***as smoke my ashes" — Tupac Shakur
Recorded mere months before his death, this specific line was cited by the Outlawz as literal operational instructions for the memorial beach ceremony.