Keith Richards collaborates with Jack White

Rolling Stones guitarist Keith Richards has recorded "a couple of tracks" with The White Stripes' Jack White.

In an interview with Rolling Stone, Richards said he enjoyed their recent studio sessions together and said he would be happy to release the material so long as White approved.

"I don't know if [Jack] ever considered that it was actually, like, master cuts," Richards said. "But at the same time if Jack wanted to do it, I'd probably say, 'Yeah.'"

"I know Jack pretty well," he added. "He's a lovely player."

Next month, Richards will convene with the rest of the Stones in London to discuss recording new material to mark the group's upcoming 50th anniversary.

Asked whether White, who has produced albums for legends such as Wanda Jackson in Loretta Lynn in recent years, might end up working with the band, Richards said: "That's always a possibility... The door is wide open."

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