Natural, uncut beads are not expensive, can be under $20 a strand. Smooth, round 10mm beads are about $30 a strand and faceted ones cost more, perhaps close to $100 a strand.
There are many different prices of these beads and it depends on the jewel quality.$11.95 for a simple bracelet to $1000,s if the beads are used with other stones and incorporated with precious metals. The choice is yours.
Tsavorite is a faceted gemstone that is not made into beads. Like rubies, it cannot be drilled. Also, since tsavorites over 5 karats are rare, the bead would be small.