When sourcing lapidary machinery, prioritize motor specifications, specifically looking for high-torque, variable-speed motors (ideally 1/2 HP to 1 HP) to handle different gemstone hardness levels. For cabbing machines, ensure the shaft is made of stainless steel to prevent corrosion from constant water exposure. Check that the diamond wheels are balanced and have a grit range from 60 to 3000 for a complete grinding-to-polishing workflow. For faceting machines, a precision index gear (96 or 64 teeth) and a digital protractor are essential for achieving high-accuracy meets.