I use silk for all my beaded projects. With emerald beads - and ruby, sapphire, and diamond - the holes are exceptionally small, as these beads/stands are sold by weight. Silk size 00/0/A is usually what the beads will accept.
Also, be aware that these beads may be drilled by hand, instead of ultrasonically drilled which ensures smooth drill holes. Many times the holes must be smoothed with a bead reamer so the silk doesn't shred.