To invest or not to invest?

So the question is invest or not to invest?

Why is this even something to question, I hear you ask? Clearly the Investment has many benefits; your stone 'will' indeed fit into the house you have made for it, and the ring will 'mostly' fit the finger it is made for, so what is the problem?

The problem is that casting investment is made from a blend of gypsum and crystobilite.  The little research I have done into this product recommend wearing a suitable dust mask to avoid inhalation as well as stating that studies have shown that silica-bearing products can cause lung irritation and silicosis over time if breathed repeatedly without protection.

So even with protection, what are the risks? 

Yes girls we have all heard the stories about the protection that was not protection enough, some of us may even be living proof of this. lol! 

But seriously, I would love any info, feedback or comments about the safety of this type of casting investment.