NOVATO, Calif. (AP) — A mysterious rock that hit a Novato home may be a meteor after all.

Lisa Webber's roof was struck during last week's meteor shower that lit up skies over the San Francisco Bay area.

Peter Jenniskens of the SETI Institute in Mountain View examined the 2-inch chunk and pronounced it a meteorite, then later decided it was just weathered Earth granite.

But Jenniskens tells the San Francisco Chronicle (http://bitly.com/SlHTRG) he's changed his mind again because an amateur meteorite hunter found another rock in the Novato area on Monday that showed the telltale sign of a meteorite — tiny specks of metal.

Jenniskens says he'll send samples of both rocks to a UCLA expert for detailed analysis.

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Information from: San Francisco Chronicle, http://www.sfgate.com