Borosilicate glass Brass Quartz Quartz with Rutile Quartz with Tourmaline Rose Quartz

Arbitrary Ball Flat circle Oval Rondel Spike

4 mm 4.5 mm 5 mm 6 mm 8 mm 10 mm 12 mm 14 mm 15 mm 16 mm 18 mm 29 mm 30 mm 43 mm 47 mm

0.5 mm 0.8 mm 1 mm 1.2 mm 2 mm 2.5 mm 3 mm 4 mm

Black gray Blue / light blue Brown / beige Green / light green Multicolor Pink / fuchsia Red / burgundy Yellow