I redesigned this.  I originally had a skull as the toggle but wasn't happy with the mechanics of how it works.  So I made a cz sparkle toggle to replace it. 

Materials:  Opal (lab created) doublet, Sterling Silver & CZ

Measurements:  1 7/8" tall by 1" wide.  17" Chain (the clasp is the toggle in the front.  I am happy to adjust the chain up to 22" at no additional charge.)

I make all my own Opal doublets.  They are made with a mix of hydroquartz and faceted Austrian crystals.  I left the Opals unbacked, so the polished inside of the settings allows the inner fire to reflect and showcase their wide array of colors.  Each one is slightly different, even though I cut all the Opal at the same time. The color variations are due to the year-long process that these cultured lab-created Opal took for maturation.  I tried my best to show all the colors, but they will surprise you in a good way in person. 

I recycle and make my own Sterling sheet. I recycle the silver scrap from broken, used or vintage items to create all new pieces.  I purposely leave the silver sheet distressed.  I could make it buttery smooth.  But that's just feels so blah, so boring. I love the character of the battle wounds left in silver when its worked into submission.