Green Turquoise Beads - All of our turquoise beads are sold 'by the strand' unless specified otherwise. Turquoise is one of the most highly prized minerals in the world. Our turquoise has varying degrees of matrix, which is the brown or black veining in the stone. Because turquoise is a porous stone it is commonly stabilized or treated to seal the surface. This process protects the color and increases its durability. Click on the image below and a new page will open offering larger views, a detailed description and purchase information.