Honestly those are potato pictures (it might be a coin, it might be a potato). So it's really impossible to tell. It sort of looks like it's been in the ground a while, so a bit of weight loss is not unreasonable. How sure are you that the scale is correctly calibrated? Any recent nickel is 5 grams as a quick & dirty check. A normal clad quarter is 5.67g. https://www.law.cornell.edu/uscode/text/31/5112 https://www.law.cornell.edu/uscode/text/31/5113
Thanks for your time I will look into it more I thought it was weathered I got the scales out weight it 3-4 times to be sure it droped down to 5.51 before I changed scales it's 5.5. Dont have the 3 number. But any way Thanks.
Remember most scales are only accurate to plus minus 10% so you need to frequently check it against a known calibration weight. And of.course, 5.30 could be 5.295 to 5.304
Sorry, but it's environmental damage. Your updated weight of 5.5 gms sounds normal based on your scale. It's a spender