Both Berylium and Boron are toxic, but in two very different doses. You actually do need a certain amount of Boron and you'll get that through apples, leafy greens, grains, certain level in drinking water and/or multivitamins. In large doses, it does get toxic.
Berylium is really only dangerous when airborne, so machine shop working with beryllium will have very strict safety policies and safety procedures. Otherwise, you'll be fine (unless you decided to chew on the beryllium cantilever, but that amount probably won't do you too much harm although you may want to have your head checked if you do chew on it)
Berylium is really only dangerous when airborne, so machine shop working with beryllium will have very strict safety policies and safety procedures. Otherwise, you'll be fine (unless you decided to chew on the beryllium cantilever, but that amount probably won't do you too much harm although you may want to have your head checked if you do chew on it)