Have you ever heard of Axial Lighting, SA? It is actually "diffused" lighting, and is excellent for Macro Photography. Excellent in the regard that it aids in the prevention of "glare back" into your lense and consequencially onto your pictures. It's really a valuable tool I feel you could make use of. It requires minimal construction of a light box, made with things you can find around the house. This may sound daunting. but is really simple.
I am going to present it to you with easy to understand instructions - complete with pictures. A child could make it, much less a new-age Grandma. lol. All you will need is a cardboard box, masking tape, a thin glass from a small picture frame, a pencil, a flashlight, and a pair of scissors.
Below, is a picture of the finished product. The glass is set on a 45 degree angle. You can arrive at 45 degrees by drawing a line to opposite corners in a square. Cut one end out of the box, cut two slits, insert glass, tape outside edges of glass, and it is done. The operating instructions are as follows: place coin in box under lowest part of glass, shine flashlight horizontally at underside of glass, and take pictures from above the coin. The light on the coin will no longer glare back at the camera.

The next picture shows what can be done by using plywood instead of cardboard. If you possess minimal carpentry skills, or know someone that does, it is much nicer. Please don't forget to tape the exposed edges of the glass.

After you build this and use it for a while, remind me, and I will give you some tips on how to tweak the box for even better photos. You will be able to shoot like this:


