14 x 10 mm stones. For the activity of the thyroid gland, it treats diseases of the throat and pharynx. Cooling and soothing - prevents swelling after a sting. Personally, as a fire sign, I put chalcedony in a Priznica poultice when my neck starts to hurt. And I'm also researching who to say calmly, because the pain in the neck is reporting it. It also affects the kidneys. It calms and balances the mind, tense nerves and weakens the state of hopelessness and dampens excitement. It alleviates sclerosis and helps with gallstones and leukemia.