This is a casual bracelet made of natural stone beads, approximately 15.5cm long. - Product No: 0014 - Size: Approximately 15.5cm - Material: Natural stone (Black Onyx 12mm) - Origin: Brazil - Quality: A Grade - Design: Bead bracelet - Style: Casual Thank you for viewing. Please note that due to the use of natural stones and handmade construction, there may be some scratches or imperfections. *Please purchase after commenting, as this item is also for sale elsewhere. Color: Black系 (Black-based) Material: Natural stone Bracelet/Bangle: Bracelet Stone Material: Onyx ==================================================================================================== 【Basic Knowledge of Onyx】 Composition: SiO2 Hardness: 7 Origin: India Mineral Properties: Onyx comes from the Greek word for striped patterns. Originally, agate with stripes was called onyx, but currently, the onyx sold as a product refers to black chalcedony. It is a very commonly used natural stone, similar to crystal. Due to its affordability and chic color, it is a highly sought-after natural stone. 【Meaning of Natural Stones/Power Stones】 In ancient Persia, onyx was called a stone of protection and was believed to protect against evil. It is also said to bring out intelligence and lead to success, so it might be good for children studying for exams. 【Recommended Natural Stone for Customers Like These】 Customers who want to wear a power stone for protection. Children who are working hard in intellectual fields such as studying for exams.