The 7 Symbols of Joy bar choker necklace. This magnificent adjustable choker necklace features alternating fancy lab-grown blue sapphires and Lafonn's signature Lassaire simulated diamonds in sterling silver bonded with platinum. May the 7 Symbols of Joy bring you Longevity, Health, Love, Happiness, Peace, Prosperity, & Friendship. Lab-grown sapphires have the exact same chemical, mineral, and optical properties as natural sapphires which vary in color, texture and pattern. We make every effort to keep our lab-grown sapphire stone colors consistent. However, all lab-grown sapphires may not be exactly as shown on the website. Stones may appear lighter, darker or have natural variations.