Beryllium



Beryllium Pieces
Source:  Found, Lab Cleanout
Purity - >99.5%

These Beryllium pieces are about the only form of Beryllium I'd handle without some serious protection.  In its solid form it is not particularly toxic, bioactive, etc.  However, as a dust, powder, compounds and everything else, it is a very poisonous substance!  It also happens to be the lightest structural metal, forming the basis for alloys in golf clubs where energy dissipation must be a minimum.