beautiful necklace! the clasp is 835 Silver - it is European necklace. the clasp set with natural sapphire which is very close to color to peridots! the peridots are approx 5.7mm, the sapphire is tall pointed cabochon with very light chatoyancy (cats eye) approx 9.5mm - at min 4.5-5Ct. please see photos for description - in excellent vintage condition! clasp shows patina and works well! the beads are shiny and smooth! it is approx 16.5? when clasped; strung on wire - so very secure! 26.40g - see photo on scales and with rulers please. fast Free USA Priority! international if needed! smoke free environment and can be gifted immediately - arrives in jewelry case! thank you