4.3" Polished Brazilian Agate Standup - Druzy Quartz

This is a beautiful, cut and polished brazilian agate. The base has been cut flat so that it's stands up nicely on a flat surface for display. The center of the ages is hollow and filled with druzy quartz crystals. The coloration of all of the agates we sell in natural, not dyed like many agates from brazil.

Agate is a translucent variety of microcrystalline quartz. Agate primarily forms when silica-rich fluids fill pockets within rock and/or fossils, depositing it along the walls of the rock. This process can result in banding patterns as fluid compositions and impurities change over time. These banding patterns can either form as flat layers, forming agates known as waterline agates, or as concentric layers typical of most agates, depending on the surfaces available for deposition.

Agate has also been known to fill veins or cracks in volcanic rock. Such agates, when cut transversely, exhibit a succession of parallel lines giving a banded appearance to the section. Such stones are known as banded agate, riband agate and striped agate.

Agates from Brazil are mined from decomposed volcanic ash and basalt from the late Permian age (248-275 million years old). In Rio Grande do Sul, the agate "mines" are normally just plowed fields in which loose agates are found and collected. These agates can be very colorful and polish beautifully.
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DETAILS
SPECIES
Agate
LOCATION
Rio Grande do Sul, Brazil
SIZE
4.3" tall
CATEGORY
SUB CATEGORY
ITEM
#61985