Manufacturer of my Tahitian Pearl Necklace?

by Jered
(Anderson)

I have a beautiful pearl necklace but I do not know how to identify the manufacturer or the value of what it is worth...? it is Tahitian color meaning black but also different shades of colors also it has diamond ringlets where every 6th pearl should be and there is a marking on it this and looks to me to be a Elo or Ela or a circle with the crown over it or something of that sort

I have never seen this marking before... I hope that's enough for you to be able to answer my question