This is my first picture post, being new to these forums... hopefully I'm doing this right. This was taken with an Olympus D490Z.
Not exacly a hobby either, but a pastime when on vacation. These are fossilized shark teeth that are millions of years old along with a few other interesting beach finds. The teeth wash up on small portion of the Gulf coast of Florida.
As you can see, it makes a nice avatar and it is my rotation of computer wallpapers.