That depends on a lot of things. Looking at agates posted for sale on Google, I see some for $15, and others for several thousand dollars. It looks like it depends on size, quality, cut, imperfections, etc. What I would do is compare the agates that you have to the ones that you see online for sale, and then determine what price you could get. The other option, but it might cost money, is to go to a gem expert and have your agate appraised.
There are a large number of collectors of agate. Depending on the appearance and location source of the agate, some could be worth a great deal. Agates are also used in making objects of art, jewelry, and even pricey faucet handles.
The value of an agate depends on its size and rarity. For instance, a Fairburn again about four inches in diameter can be worth over $1,000.
600$
semi precious
This site will explain:* http://cash-and-treasures-wiki.travelchannel.com/page/Origin+of+Agates?t=anon
Agates can be found in various places around the world, including river beds, volcanic rocks, and areas with geothermal activity. Some popular locations for finding agates include the beaches of Lake Superior in the United States, the coasts of Brazil and Uruguay, and the state of Gujarat in India. Additionally, agates can also be found in certain regions of Australia, Mexico, and Germany, among others.
somewhere... near a volcano or dormant volcano
eBay is one place.
Moss Agate and Turritella Agate
Agates have been found and used for ornamental purposes for thousands of years. They are typically formed in igneous rock formations and have been collected by humans for their beauty and believed metaphysical properties.
Tennessee Agates are primarily found in the areas surrounding the Cumberland Plateau in Tennessee, United States. Some specific locations include the counties of Smith, Warren, and White.
Agates are typically recognized by their banded patterns in various colors. They often have a translucent or semi-translucent appearance with a smooth texture. Agates are generally found in nodules or geodes in volcanic or sedimentary rocks.
Agates can be found in a variety of locations around the world, including areas with volcanic activity or in sedimentary rock formations. Popular locations for agate hunting include parts of the United States (such as Oregon, Minnesota, and Michigan), Brazil, India, Mexico, and Australia. Agates are often found near coastal regions or in areas where there has been significant geological activity.
People with money they seem this is a pretty stone