Amplifying our limited physical gaze is one of the wonders of science - let my affected eyes say so! Those lenses (magnifying glasses?), besides being utilitarian, are very attractive objects, and your photos, @velimir, make them even more so. They fascinated me, especially the second photo (its reddish color): in all the approach that allows to capture the reflection in its crystals, introducing part of the reality out of field. Thank you!