Carpenters often cut wood at the construction site. Carpenters construct and repair building frameworks and structuresâsuch as stairways, doorframes, partitions, rafters, and bridge supportsâmade from wood and other materials. They also may install kitchen cabinets, siding, and drywall.
Beryllium is a chemical element with symbol Be and atomic number 4. It is a relatively rare element in the universe, usually occurring as a product of the spallation of larger atomic nuclei that have collided with cosmic rays. Within the cores of stars beryllium is depleted as it is fused and creates larger elements. It is a divalent element which occurs naturally only in combination with other elements in minerals. Notable gemstones which contain beryllium include beryl (aquamarine, emerald) and chrysoberyl.
Beryl is a mineral that contains a significant amount of beryllium. Beryllium is a very rare metal, and that limits the occurrence of beryl to a few geological situations where beryllium is present in sufficient amounts to form minerals.he extraction of beryllium from beryl is very costly, and as long as bertrandite is available in large amounts, beryl will be a minor ore of that metal. The primary economic use of beryl today is as a gemstone. It occurs in a wide variety of colors that appeal to many consumers.