Simple and Trendy. This brushed-finish adjustable solitaire necklace features a sparkling cushion-cut purple fancy lab-grown sapphire in sterling silver using Lafonn's exclusive TR Gold, a new and improved plating process that preserves the rich color of gold and enhances the wearability of our gold-plated styles. 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.