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Agate Mineral | Everything You Need to Know

limz Published On Sun Feb 02 2020   Modified On Sun Feb 02 2020
Agate Mineral | Everything You Need to Know

Agate is a beautiful stone that chiefly consists of chalcedony, alternating with microgranular quartz. These stones are translucent to opaque and their streak is white. 

Agate symbolizes peace, maturity, harmony, happiness, joy, and strength. These stones are a calming and soothing stone that helps the wearer to reduce their anxiety or stress.

Let us learn more about Agate:


Agate is a variety of chalcedony and a natural form of Silicon Dioxide. These stones are typically banded in appearance. As chakra works according to color, these stones can help to open up and balance all the chakras of our body. It helps the wearer to promote self-respect, spiritual communication, and relationship. It is an excellent stone for cleansing and stabilizing the aura.

Origin and History

Blue Dyed Agate.
Blue Dyed Agate.
Image Source: The Crystal Garden

The name Agate was derived from French, via Latin from Greek "Akhates", during the late 15th century. This stone was believed to be first discovered by Theophrastus, a Greek philosopher, around the 3rd and 4th century (BC). Over 3000 years ago, Achates (Dirillo) river was the source of colorful Agates and other chalcedonies.

Agates have been worn mostly by prophets in Islamic culture believing that it will help to ward off evil thoughts and deeds. It can be found throughout the world but the fines Agates come from a town in Germany, Idar-Oberstein. 

Formation Process

Naturally, Agates are formed in the volcano when cave water that has an intense amount of silica keeps dripping through the cavities between the rocks. In the small holes of volcanic rocks, this silica keeps on piling up and after a long course, it ends up filling the holes. After the holes fill up completely, the layer starts forming themselves in the form of microcrystal. It results in forming up the bands found on Agates.


The chemical formula of Agate is SiO2(Silicon Dioxide). The hardness of this stone is 6.5-7 according to the Mohs scale and they have a waxy luster.


Different Types of Agate.
Different Types of Agate.
Image Source: Pinterest
  • Onyx Agate
  • Sardonyx Agate
  • Iris Agate
  • Crazy Lace Agate
  • Thunder-Egg
  • Enhydro Agate
  • Polyhedroid Agate
  • Moss Agate
  • The Lake Superior Agate
  • Condor Agate
  • Sagentite Agate
  • Fortification Agate
  • Fairburn Agate
  • Botswana Agate
  • Dendritic Agate

Colors Available

  • Brown
  • White
  • Red
  • Gray
  • Pink
  • Black
  • Yellow

Mines Available

  • Opal Hill Mine, California, USA
  • Thunder Bay Mine, Canada
  • Cuesta Fire Agate Mine, North of Oatman, Arizona

Cost Per Carat

The price of Agate can vary from $1-$50 or $100 depending on its banding pattern and color. Among all the types of Agate, Fire Agate is the most sought after and valuable.


  • Due to Agate's high polishing ability, it has been used for leather burnishing for centuries.
  • These stones can also be used to make knife-edge bearings for laboratory balance.
  • It has been mostly used to make ornaments like jewelry, brooches, and pins.

Spiritual Properties

  • As Agate helps to enhance communication skills, it is a great stone for the people who have trouble speaking their minds.
  • These stones help to harmonize the body, mind, and soul, protect the wearer from evil spirits, and provide an abundant amount of love for self and others.
  • It promotes the function of metabolism, helps to treat insomnia, reduces the risk of kidney problems, and helps indigestion.


Moss Agate.
Moss Agate.
Image Source: Pinterest
  • There has been a trace that Agates were used back in the back to 20000 to 15000 BC.
  • Unaltered Agates have a conchoidal fracture and they are far less brittle than rock crystals.
  • It is believed that Mithridates, King of Pontus, collected about two to four thousand bowls.
  • Traditionally, these stones are given as a gift on the 12th and 14th wedding anniversary.

Jewelry Stores Near You

  • Kehoe's Agate Shop, Bigfork, Montana, US
  • Rock and Gems Canada, Whistler, Canada
  • Frost, London, UK

Online Stores

  • The Russian Stone
  • Camille

Visit Stoneharu for more information about stones and gems.