Here is a brief description of tellurium. It is brittle and easily pulverised.
Tellurium is a p-type semiconductor, and shows varying conductivity with crystal alignment.
Its conductivity increases slightly with exposure to light. It can be doped with silver, copper, gold, tin, or other elements. Here is a brief summary of the isolation of tellurium. It is not usually necessary to make tellurium in the laboratory as it is commercially available. While there are some tellurium ores, most tellurium is made as a byproduct of copper refining.