These beads are on 15 - 16 inch strands, temporarily strung, usually on monofilament (plastic fishline).
The holes are relatively small, probably less than 1mm. You won't be putting leather through them.
As with all the natural stones, color and "look" may differ from strand to strand and even from bead to bead.
Shockingly, some of the stones are dyed.

Combine all the individual strands (mixes not included)
listed in the SEMI-PRECIOUS BEADS category to get the pricebreaks.