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Agate Black

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Black agate is a charming variety of chalcedony (general name for cryptocrystalline form of quartz). This stone is captivating for its dark banded lines. This piece is from Brazil.

Agate uniqueness: The black patterns are a result of carbon absorption into the individual agate layers, followed by a fire treatment. Interestingly, in the middle ages, people dyed agates with sugar or honey solutions. The stones were then bathed in sulphuring acid, which turned them black. Black Agates were used in gems engraving and intaglios – carved reliefs.

Special conditions/ treatment: There is no need for special handling with Black Agate.

About the product: The product is packed in firm plastic bags.