Last week when I bought this quartz piece, the box it came in had "Hematite" written on the bottom of it which threw me off and I wasn't sure what it was, but I realized it is just quartz. Anyways, is there a specific name for it, like clear quartz, smoky quartz, or lithium quartz or something like that? Or is it simply a piece of quartz? For the record, the back side is a bit dirty (naturally) so it gives it a bit of a darker spot in it at times. Thank you.