Originally used by fishermen in Japan in the early 1900s, glass fishing floats quickly gained popularity around the world. They were not only functional but also served as works of art, with intricate patterns and colors swirling within the glass. Each float was unique, making them highly collectible and sought after by tourists and collectors alike.
(8) With hair inspection: Put the crystal on a hair, the human eye can see the double shadow of the hair through the crystal, it is natural crystal, mainly because the crystal has birefringence.