This is a strap made with Tanzanite (8mm), Blue Topaz (6mm), Blue Lace Agate (6mm), and Quartz (6mm, 4mm). We can also create custom-made straps by combining other stones of your preferred type, color, and effect. We also offer discounts for bulk purchases, so it's recommended to wear them with friends or lovers☆ Please feel free to contact us if you are interested. ☆After-sales service We provide after-sales service for all products. Please see the separate page about after-sales service for details. Motif material...Natural stone