I'm a proud owner of a LOMO SF100 stereo microscope. Why did I buy a microscope? Probably for the same reason a lot of people buy a microscope - just to look at things in general. For that kind of use, a stereo dissecting scope like the LOMO SF-100 is ideal. Just stick a rock, leaf, flower, twig, insect, thumb, whatever and focus. It's a whole new world under the microscope and best of all, there are no slides to prepare or mounts to make as with a conventional compound microscope. Want to work on your jewelry? Inspect coins? Work on your dentures? Dissect a … whatever. Images through a stereo dissecting scope right side up and correct right to left. Even better, since you are using a separate optical system for each eye, you also see in 3D so it's like you've entered another realm of nooks and crannies you never knew existed. A rock that appears smooth in the hand is, in fact, a world of caves and tunnels. Indeed, this new view of commonplace items may make a stereo dissecting microscope the best learning tool you can use with your kids. Just turn them loose in the backyard to collect samples and stick them under the microscope. (The samples, not the kids.)
That may be an achene of broomsedge bluestem (Andropogon virginicus). For all those birders historically looking around for broomsedge fields, this may be an indicator.