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Fairburn Agate: South Dakota, Banded Thrill

Fairburn Agate: South Dakota, Banded Thrill

Fairburn Agate is a type of agate distinguished by its exceptionally complex and irregular banding. Unlike regular banded a…

Quartizite: Properties, Colors, Uses

Quartizite: Properties, Colors, Uses

Quartzite is a metamorphic rock primarily composed of quartz, formed from sandstone through natural heat and pressure over …

Chalcopyrite: Copper Ore, Properties (Photo)

Chalcopyrite: Copper Ore, Properties (Photo)

Chalcopyrite is a copper iron sulfide mineral, with the chemical formula CuFeS₂. Because of its abundance and ease of extrac…

Amygdaloidal Agate

Amygdaloidal Agate

Amygdaloidal agate is a volcanic rock formed when silica-rich fluids fill gas cavities within solidifying lava, resulting i…

Velvet Obsidian: Volcanic, Shimmering Delight

Velvet Obsidian: Volcanic, Shimmering Delight

Velvet obsidian is a rare variety of obsidian , with a deep black color and a velvety sheen that shimmers with iridescent gr…

Recumbent Fold

Recumbent fold is a geologic feature in which rock layers are folded nearly horizontally. The axial plane, which is the imag…

Gemstones Found in Metamorphic Rocks

Gemstones Found in Metamorphic Rocks

Metamorphic rocks can be a treasure trove for some of the most beautiful and valuable gemstones on Earth. Examples of gems c…

Turritella Agate: Fossilized Snail Gemstone

Turritella Agate: Fossilized Snail Gemstone

Turritella agate is a fossilized gemstone formed from the unique combination of ancient snail shells and mineral deposits. C…

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