The agate oval gemstone cabochon shown here is 37mm long. It is available to be handcrafted into a custom made ring or pendant for you. 

Agate is traditionally believed to help you to discern truth, improve memory and concentration, increase stamina,  prevent insomnia and ensure pleasant dreams, enhance personal courage, protect you against danger, and provide a calming influence.

This cabochon has been dyed. You can read more about gemstone treatments here. In order to keep your stone looking good, it is recommended that you do not get it wet or expose it to sunlight for prolonged periods. Your piece can be cleaned using a soft silver polishing cloth.