(CC015) Aragonite


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Aragonite is a mineral that is primarily composed of calcium carbonate. It is a polymorph of calcite, meaning that it has the same chemical composition as calcite but a different crystal structure. Aragonite is known for its distinct crystal habits and colors, and it has several notable properties and uses. Here is an overview of aragonite:

Characteristics of Aragonite

  • Color: Aragonite can occur in various colors, including white, yellow, orange, red, green, blue, and brown. The coloration is often due to impurities in the crystal structure.
  • Crystal Habit: It commonly occurs in prismatic crystals, often with striations along the length. It can also form in needle-like or columnar aggregates, as well as in stalactitic, botryoidal, or reniform masses.
  • Transparency: Aragonite is typically translucent to opaque, with transparent crystals being less common.
  • Luster: It has a vitreous to resinous luster, depending on the quality of the crystal.

Formation and Occurrence

  • Formation: Aragonite forms under a variety of conditions, including in sedimentary, metamorphic, and hydrothermal environments. It often precipitates from calcium-rich waters, such as those found in caves and hot springs.
  • Geological Occurrence: Aragonite is found worldwide, with significant deposits in locations such as Spain, Morocco, Italy, the United States, Mexico, and Namibia.

Uses of Aragonite

  • Building Material: Aragonite has been used as a building material for thousands of years. It is often crushed and used as a component in concrete and plaster.
  • Gemstone: Transparent and faceted aragonite crystals can be used as a gemstone, although they are relatively soft and are not as durable as other gemstones.
  • Coral Reefs: Aragonite is a major component of the skeletons of reef-building corals. It is deposited by corals to form their hard, structural support.

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Weight ,470 kg
Dimensions 10 × 7 × 4 cm
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