Natural [Unstained] Agate Slice 180mm

Description: High-quality agate, naturally formed from Brazil, displaying contrasting bands representing the growth that has taken place over millions of years. Agate is banded chalcedony, a form of microcrystalline quartz made up of twisted crystal fibres, perfect for interior display and Includes free UK delivery.This piece of agate shows a great insight with the contrasting bands representing the growth that has taken place over millions of years. Agate is banded chalcedony, a form of microcrystalline quartz made up of twisted crystal fibres. Forming within the cavities and veins of lava, Agate replaces other mineral deposits and limestones and mostly found within volcanic lavas.The Rio Grande do Sul, north of Uruguay is considered to be one of the best locations for finding an agate slice in Brazil and the rest that follows are the States of Santa Catharina, Parana, Sao Paolo and Minas Gerais. Two Agate slice producing areas are in the States of Bahia in East Central Brazil, and one other in the state is Roaraima in Brazil's extreme Northwest.The most explosive volcanoes produce ashes or tuffs, creating a mixture of ash, lava and sediments which are torn from the surrounding rocks. It's thought that micro-shards of silica in glass form produced by erupting volcanos which produce ash and tuffs, eventually release silica that permeates through old underlying lava cavities through atmospheric and rainwater and can also include decomposing of vegetation and animal matter within the sediments deposited between eruptions. Type: Agate.Formula: SiO2 (Silicon dioxide).Age: UnknownOrigin: Ametista do Sul, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil.Agate measurements.Height: 10.5 cmWidth: 18 cmDepth: 0.5 cmApproximate weight: 0,252 g

Price: 81.6 GBP

Location: Heswall

End Time: 2024-12-29T17:41:25.000Z

Shipping Cost: 0 GBP

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Sub-Type: Agate

Type: Minerals/ Crystals

Shape: Natural

Country/Region of Manufacture: Brazil

Finish: Polished

Modified Item: No