This boulder Opal slide style pendant has lots of that  character that  Boulder opal is known for ….with a beautiful swirl of  shimmery aqua running the length of the blue tones of the opal, it a stunner. The opal has an organically slightly undulating surface and measures 25mm x 21mm and comes with a waxed cotton necklace with slip knots to adjust the length so the pendant will suit everybody.