Shop Ronni Simon Designs › Picasso Jasper & Black Onyx Knotted Necklace Image 1 of 2 Image 2 of 2 Picasso Jasper & Black Onyx Knotted Necklace Sale Price: $150.00 Original Price: $195.00 44” continuous strand of 14-25mm Picasso Jasper & Black Onyx knotted on a 10mm silk thread. Add To Cart Added! 44” continuous strand of 14-25mm Picasso Jasper & Black Onyx knotted on a 10mm silk thread.