making sphere beads

[Salemtrivals]

HELP!!

I really want to make some spherical beads out of stones. I am starting with sandstone but I want to work my way up to harder stones or even semiprecious gemstones.

I have found this drill tip \/ at the web link below but it says it is for woodworking and not lapidary 
        ( https://www.banggood.com/Drillpro-24pcs-Alloy-Ball-Woodworking-Tools-Wooden-Beads-Drill-Rotary-Bead-Molding-6-25mm-p-1069429.html?gmcCountry=AU&currency=AUD&createTmp=1&utm_source=googleshopping&utm_medium=cpc_bgs&utm_content=frank&utm_campaign=frank-ssc-au-all-19bf11&ad_id=394440119654&gclid=EAIaIQobChMIk6P4xqy35gIVVxiPCh2dwwNjEAQYAyABEgIZcPD_BwE&cur_warehouse=CN )

Can anyone help me find drill tip like this used for cutting stone beads instead??

thank you!

[Faceting Frank]

If you type in “lapidary drill bits” in the search field on eBay you will come up with dozens of them.

[Rusted]

I am pretty sure you wont find anything like what you are after, you will find drill bits for drilling the hole but not shaping the tiny sphere.
Rock beads can be done but use a completely different process. Look for "bead mill". Basically two iron plates with matching grooves machined into them, one spins, the stones are put in the groove with grit and they just roll around until they are spherical.

[Faceting Frank]

Ah you mean making the spheres.
https://www.youtube.com/watch?v=qCAnkpomduM
To make the big ones they use three spring loaded rotary heads, a lot of expense for sure.