[Rockhounds] sphere-makers: how do you make very tiny spheres?

[DonH]

BNMJEFF at aol.com wrote:

> Wouldn't that be a bead at that point and use beadmaking  equipment?

Thanks, I'm sure you are correct... I had the term "micro-spheres" in my 
head and didn't even think "beads..."

If someone wants to know why: tiny spheres or balls of mineral are 
really useful in teaching and demonstrating mineral optics.  While 
helping someone else with their project, I came across some sapphire 
balls in 100 - 300 micron sizes, and these are great for demonstrating 
interference figures and optical orientation in minerals.  Their real 
purpose was for jewel bearing in watches and other industrial uses!  The 
vendor was a little puzzled at first, but then understood my reason for 
buying them.

Now of course I would like to have some made of feldspars, quartz, 
calcite, topaz, and a few other key minerals.  That is why I'm wondering 
what equipment might be used to make something that small and round.  Of 
course, it's a long shot that someone here would know, but then again 
I've always been surprised at the depth and breadth of experience 
represented here.

All the best,
Don