what you will need:
looong chains (or short if you prefer)
Agate Druzy Slices (I bought mine at a gem and rock show for $2 each, but you can get them here for about $5 each (when you buy 6)
1. Take your VERY long chain and double it over (if you want 2 lines of chain on each side, like the necklace on the far left) (or keep it normal, like the other 2 necklaces).
2. put one end through the agate's hole, and bring it up to meet the other end
3. At the base where the chain and agate meet, create a knot. (I just kept both sides of the necklace together as I did a regular square knot.)
4. Use a jump ring to connect the two ends of the necklace. (Use your pliers to pry the ring apart.)