Black Diamond 2mm Swarovski Round Crystals
These crystals are 2mm and come in a package of 1/4 gross (36 beads).
They can be used with size 11 seed beads and a size 11 beading needle (first picture shows needle with one crystal and one size 11 seed bead).
They are often used for edging beadwork or to provide a pop of color. (Second picture shows an olive green 2mm crystal used in loomwork with size 11 Delicas).