GOLD!

To prepare our little booklet on gold, we need -- obviously -- a photo of gold. In particular, a photo of gold as it comes from a river after hours of strenuous panning.
I remembered that I had a small vial of the results of a panning day in Montana in 1973. All the water in the vial had long since dried out, and I was afraid to do anything more than add new water to the old vial, in fear of flushing the lot down the drain.
Then -- how to take a photo? Hah! As ever, my trusty world's cheapest scanner came to the rescue!