I made this antique turquoise piece using 2 sizes of round turquoise beads. You may use from 8mm for the smaller ones and 20mm for the big ones to have this effect. I use wire wrapping technique for each dangle with bronze eye pins to get that antique effect that would match the spider veins in the beads. I then wrapped 4mm Swarovski crystals in topaz and teal to accompany the dangle.
In this collar, I make five big dangles and six smaller ones depending on the size of the neck. Note: a longer necklace would not have the same effect!
I put it together by stringing smaller turquoise bead, alternating with two Swarovski crystals until I get to the place where I want the dangle to start. And then I string the dangle in between the crystals alternating between smaller and bigger ones and put the clasp at the end.