This is a top grade strand of bright royal purple “gel” sugilite beads complemented by solid 18k gold beads and clasp. The last photo in the series shows four sugilite necklaces for comparison.
Sugilite is a relatively new gemstone that is found only in South Africa and is no longer commercially available. The rondelle beads in this strand range from approx. 9 mm down to 4.0 mm except for the center bead which is 10.0 mm. Wire protectors, and crimps, which are subject to wear/stress, are made with gold filled components for greater durability.
Beware of fake sugilite and simulants for sale on the Internet. I have seen dyed chalcedony and jasper marketed as sugilite. You can be confident that you get what you paid for at ARJ.
Learn more about Sugilite at this link.