I found one of my first attempts at making crystals. The slide was a discard and not labeled but I believe it is ASA* (Aspirin).
I could not identify anything for certain, but Photo 1 looks pretty.

In photography, many people talk and write about Bokeh**. Is Bokeh relative in microphotography?
I did not have to try very hard to achieve it in Photo 2.

If Photo 3 is in fact ASA, do you really want this in your stomach?

* ASA, acetylsalicylic acid
** Bokeh is the aesthetic quality of the blur produced in the out-of-focus parts of an image produced by a lens.
Details:
Unknown specimen crystals
Canon 5D
Nikon PL 2.5x eyepiece
Labomed LB-592
Obj.: 10x & 20x Inf. Pol Plan
Stacking: CombineZP
Post processing: Adobe Lightroom