Sterling silver blue john split heart necklace p575 this intimate necklace features two highly polished blue johnstones that have been sourced directly from the blue john cavern in castleton derbyshire the individual blue johngemstones have been framed within sterling silver in an elegant teardrop design and sits gracefully on an 18 inch sterling silver chain the pendant is a symbol of unity and love between two people be it family friends or partners and would be a beautifuladdition t