Help with Cuyamaca Mountains Mineral Specimen

[RJW]

These crystals are pretty common in my neighborhood in the Cuyamaca Mountains, San Diego Co., California. I'm new to mineral ID but interested in getting better at it and building a collection.

Can someone help with ID of this gray mineral with the distinct unidirectional ridges. I thought the white stuff around it might be quartz or feldspar - help there would be great too!

Thanks.

 

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[ice9]

Smoky quartz and white feldspar. Might be an indicator of pegmatite, which is where the really good stuff like tourmaline is found!