Here we have Metal Spirals in which to place tumbles, points and spheres so you can wear your crystal friends as a necklace.
There are two sizes and two colours. The metal is silver and brass coated copper.
When selecting you metal spiral, the wire is about 1 mm either side. So if you have a crystal up to 22 mm it will fit the larger size but that’s the maximum unless you twist the wire to expand. A crystal up to 17 mm fits the small spiral.
The small silver is softer metal so more easily expanded. The medium size are more rigid.