Carnelian
Varieties of chalcedony show an amazing variety of colors and patterns. The translucent stripes and bands of agates, the rich opaque green and brown of fine-grained jasper, the plant like forms of moss agate, the green and red pattern of bloodstone, the rich translucent orange-red of carnelian and apple-green of chrysoprase, and the opaque black of onyx are all faces of the versatile quartz gem.
Durable and easy to care for, chalcedony has a hardness of 7
-Source AGTA