Black Agate 黑玛瑙 10mm

Stainless steel dragon and abacus accessory 龙头算盘配件

Black agate is a form of chalcedony which is a form of Quartz crystal. When you hold this stone and look at it, it will look like solid rock but when you hold it up to the light, you will notice that it’s actually translucent. Black agate stone is found all over the world with the biggest mines in Brazil, Mexico, United States, Uruguay, and Madagascar. On the Mohs scale of hardness, it comes with a rating of 7 which makes it suitable for making all types of jewelry. Best quality stones come with less than 10% of inclusions, medium quality with 10%-25% inclusions while lowest quality stones have more than 25% of inclusions and layers.