Agate Geode - Layer of Agate surrounding a cavity in a geode that is usually lined with a layer of small Quartz crystals. Blue Lace Agate - Agate with light blue bands in a lacy or wavy pattern. Botswana Agate - Agate from the African country of Botswana banded with fine parallel lines of white, purple, or peach.

Agate is the most varied and popular type of Chalcedony, having many varieties on its own. Although the pattern on every Agate is unique, the locality of an Agate will provide resemblances in banding style and color, thus lending many Agates with a geographic prefix.

The variety Agate is a multicolored form, well known for its distinctive banding patterns. Some forms of Chalcedony, such as Chrysoprase, are intensely colored, while others are light. In blue Chalcedony, the deeper the color, the more desirable the gemstone. The classic Chalcedony varieties are described below: Agate

Agate Jasper - Opaque multicolored Jasper, or Jasper with banding; may also refer to a single stone with a combination of both Agate and Jasper. Biggs Jasper - Jasper from Biggs Junction, Oregon, with varying light and dark color brown bands and pretty formations.

Its Agate variety is also found in geodes, commonly lining the outer layer underneath the larger Quartz crystals. Chalcedony also forms pseudomorphs after organic material. A well-known example is petrified wood, in which the wood has been completely transformed into Chalcedony. In the Petrified Forest National Monument in Arizona, an entire ...

Moss Agate - The Mineral and Gemstone Kingdom . Minerals.net . Complete Information Guide to Rocks ...

Though often a solid color, it may also be banded, in which case it would be jointly classified as both Agate and Carnelian. Carnelian is an ancient gemstone, having been used as gem material since antiquity. Although still used a gemstone today, its significance and value has been diminished since the ancient times.

Green Onyx - Often refers to Chalcedony dyed a deep green color; may also refer to Agate banded light green and white. Sometimes also incorrectly used to describe green Onyx Marble (above). Onyx Opal - Banded, dark colored Opal. Rhodochrosite Onyx - Banded variety of Rhodochrosite .

Agate from the Mexican locality of Agua Nueva. Agua Nueva Agate is known for its purple and pink banding formations.

Agate from Hungary from Gyöngyöstarján, Hungary. Agate Mineral Detail Page