Tiny Tuesday 12 :: mystery macro

Participants in this week's Tiny Tuesday  challenge have been instructed by osuzanna as follows:
"... This week’s Tiny Tuesday theme is “Mystery Macro".  To participate, take an extreme close-up of something, but do not identify it, giving everyone has a chance to guess what it is.   On Wednesday, be sure to post the "Reveal"  image in your extras.  To see how that went last time, have a look HERE.  There will be 3 tags for this week:  TinyTuesday, TinyTuesday12, and TT12MM ..."