DENDRITIC AGATE

This is a natural agate from brazil showing  fern-like dendrites made of manganese/iron silicates  trapped inside the crystalline structure of the white -colored opal  agate, making this an intriquing and unique gemstone. They form as nodules.The dendritic inclusions, and are shaped like trees  with some very interesting patterns.

well cut and polished

Weight 18.55 cts app

Size 20 x 20 x 6 mm app

Agate  is a microcrystalline variety of quartz (silica), chiefly chalcedony, characterised by its fineness of grain and brightness of color. Although agates may be found in various kinds of rock, they are classically associated with volcanic rocks but can be common in certain metamorphic rocks.

Colorful agates and other chalcedonies were obtained over 3,000 years ago from the Achates River, now called Dirillo, in Sicily.