6mm 8mm 10mm Round gemstone beads 5# red synthetic ruby ball

6mm 8mm 10mm Round gemstone beads 5# red synthetic ruby ball

Balls & balls measuring head jewels are made of synthetic sapphire/ruby. They are largely used in heavily corrosive environments and optical fiber communication because of its anticorrosion, wearable, and fine transmission characteristics. Balls measuring head jewels are used as insulated measure heads on precise instruments.