To make hemp jewelry, you must first select the hemp string. Although hemp is now available in several colors, the firm "tan" color is still the most popular. Most hemp jewelry is from 1 mm or string "20 pounds". However, I've seen thicker strings to good use, especially for men's necklaces. Make sure the string is a uniform thickness (not too bulky the number of bits) and soft (unless you like the rough texture). You could try waxing hemp and, if you like that look.
You do not really need other supplies to hemp necklace. However, you may want to add beads or charms, and to animate things.
Finally, if you want to end the necklace with metal clasp, you need to get some tips on leadership. These go beyond the end of the cable, leather belt, or in this case, the hemp. There are two types, one is a metal flaps that bend over the management and the rest of the coil, the bottom of which is crimped around the wire.