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Object found , opinions wanted

Hello, I wanted to share this object I found and get peoples thoughts on it. It was found while gold dredging this summer in the North Central Cascades, Washington State, USA. It appears to me to be a micro engraved artifact of unknown origin. It measures approx. 4.1mm x 3.1mm and is .49mm thick. It appears to be copper coated gold with a precision micro engraved repeating pattern etched into the surface.

IMGUR image address is:

http://imgur.com/a/hB05i