Hello Jim:
Most of these chip and the ones you have with the FLAT spot were in the fire, the white is from the paper box that the 5's were in. the flat spot is from the heat of the fife. These chips came out a little over a year ago and there were several thousand offer to the market, we have seen nice loking chips retail for $5.00 and the damaged pcs going for $1.00 to $3.00