Handmade jewelry/jewellery, or handcrafted jewelry/jewellery, is jewelry that has been assembled and formed by hand rather than through the use of machines.
[2] This means that jewelry may be made using drills, lathes, or other machinery, but it must be guided by the human hand.
This precludes the use of mass production procedures such as punch presses, CNC machinery, and casting, to name a few processes the use of which would make the jewelry not qualify as "handmade".
Beyond that, handmade jewelry can be made out of any material and with a wide variety of techniques.
Handmade jewelry can be made using any materials and techniques provided they are manually done.