A cute domestic smoky quartz brooch that looks like a colon and a beetle Chic and recommended for men. It looks good to attach it to an outerwear such as a coat with a moderate size Brooch material Brass Stone size 25.3 x 16.8 x thickness 13.4 mm Weight 7g One point thing No resale What is Smoky Quartz? Smoky quartz is a crystal that contains a small amount of aluminum and changes its color from light brown to blackish brown due to the influence of natural radiation. In Japanese, it is called "smoky quartz." Natural smoky quartz is very rare.