I took a minute to check the drops for discriminating features, because oh boy!  Wouldn’t I be over the moon if they were gems!  They are very rich looking to me irl because of the smoky color.  
Sadly, I also found one of the drops has a chip at the top, and it’s very sharp where the chip is.  That’s another indicator of glass, right?  The only other things I can think of that’d have an edge so sharp, and be so clear, maybe quartz?  And I don’t know if you can facet quart this finely?