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JC AMBERLYN/MinerJon Kaufman shows some core drillings Tuesday morning.

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What can Brown drill for you?

Brown Drilling, the only exploration drilling company in Kingman, bought its third exploration rig recently and is sending it to Nevada for work on an active gold mine.In 2007, the sister and brother team of Amanda and Jon Kaufman bought Brown Drilling - which at the time specialized in water-well drilling - and expanded the business to include exploration drilling.Exploration drilling is used to search for gold, silver, copper or any other type of material found in the Earth's surface.