From the AP (link courtesy Brian Turner) :

In comments published Tuesday, the 63-year-old Rolling Stones guitarist said he had snorted his father’s ashes mixed with cocaine. “The strangest thing I’ve tried to snort? My father. I snorted my father,” Richards was quoted as saying by British music magazine NME.

“He was cremated and I couldn’t resist grinding him up with a little bit of blow. My dad wouldn’t have cared,” he said. “… It went down pretty well, and I’m still alive.”

Richards’ father, Bert, died in 2002, at 84.