Material: Blue Aventurine Silica 12mm Origin: Madagascar Size: Approximately 12mm (±0.5mm) Wrist Size: Approximately 16.5cm (elastic) Weight: Approximately 42g Features and Meaning: We have received a rare color of blue aventurine silica! This batch has a deep color, and the contrast with the white silica is beautiful. There are many colors of blue aventurine, such as light blue, blue-green, and deep blue. Among them, the most popular is blue aventurine with a deep blue color like lapis lazuli or sodalite. Aventurine is a mineral of the quartz group, and is officially called "blue aventurine quartzsite." Blue aventurine is sometimes called blue quartzsite because it does not show much aventurescence, which is a characteristic of aventurine. Item No.: BG5973-12