Gold Coin Find

I was very pleased to receive this aura photograph with the following message: Hello David, I found 13 gold coins at 185cm depth. Thank you so much.

The photo, which led to the find was taken with a Canon DSLR camera with standard lens and infrared filter. The coins, I learned were pre-Roman, weighing 8.4-8.5 grams each so that is equivalent to 110 grams (3.85 ounces Avoirdupois or 3.5 ounces Troy) of gold. This is particularly interesting as it shows the camera is capable of picking up a relatively small amount of gold at 6 feet depth or more.

The finder sold the coins for $20,000!