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Colourful thorax and body, glistens in sunlight. Very tiny beetle.
Found enveloped amongst a spider web at work
It is definitely Buprestis aurulenta, a rather common Buprestid in forested areas of California and Oregon.
This one is probably the same one:
http://www.panoramio.com/photo/59577509
The ID of Green pubescent ground beetle, Chlaenius sericeus, for this one is in my opinion wrong.
I think it might be Buprestis aurulenta, but somebody has to confirm that.