Agate is usually found alongside numerous other types of rock, but it is primarily classified as volcanic rock. Agates frequently form within pockets of igneous, sedimentary and metamorphic rock such as granite, melaphyre and porphyry. Deposits of silicon dioxide typically form in almond or ball-shaped nodules and as the deposits continue to build over long periods of time, parallel bands are created through the process. Banded specimens are referred to as agate, while uniform and blended species are classified as chalcedony, carnelian, moss agate or other specific trade names.
Agate stones available on the market today, originate from deposits all over the world including Myanmar, Brazil, Uruguay, Argentina, Mexico, Botswana, India, Australia and the USA.
Agate gemstones are one of the oldest stones in recorded history. Agate is known as a stone of protection, protecting one from nightmares, stress and fatigue. Since biblical times, agates have been worn and used in jewelry to protect against imminent storms. They were highly valued as talismans and amulet throughout ancient times.
Agate has the ability to quench thirst and protect from fevers. Alternative healers will place agate stone on the solar plexus to alleviate stomach illnesses. Agate is a stone of strength and gives the power to move forward and carry on through tough times.
Agate occurs in wide range of colors and patterns. Although some colors occur more commonly than others, almost all agate will be multicolored due to unique banding. Single-colored agates can occur naturally, but most of the stones available today have been dyed to obtain unicolor. Single-colored agates are often traded using specific trade names, such as sard and carnelian. Agate colors can include black, white, blue, red, green, yellow, orange, brown, pink, purple and gray.