"Kyoto Opal" is synthetic opal that was made by KYOCERA.
Synthesize silica particles has been strengthen by colored plastics.
The each color beads were named from traditional color names of Japan.
white bead ..... Gofun (sea shell powder)
pink bead ..... Sakula-ilo (cherry blossoms)
sky blue bead ..... Asagi-ilo (pale leek)
dark red bead ..... Karakulenai (Korean-Chinese-style carmine)
dark brown bead ..... Momoshiocha (repeatedly dyed)