On 28.10.2020 we received this unique Jade (Our forklift truck can handle everything, except this bo

On 28.10.2020 we received this unique Jade (Our forklift truck can handle everything, except this bo

Carborundum from Uzbekistan

Carborundum from Uzbekistan "Rockshop" sales box with 54 pieces.

Aragonite from Spain "Rockshop" sales box with 54 pieces.

Our own Rockshop label has been marketing sales boxes for over 40 years. In addition to beautiful sales boxes from South Africa (Malachite & Cactus Quartz), new from Mexico (Calcites, Vera-Cruz) and new is the Spanish series with sales boxes.
Availability: In stock
SKU
10513
  • Buy 3 for €69.00 each and save 13%
Aragonite from Spain "Rockshop" sales box with 54 pieces. is available to buy in increments of 1

The mineral aragonite is a calcium carbonate with chemical formula CaCO3. It is an unstable polymorph of calcite and is therefore difficult to distinguish from calcite since most of its properties are the same. A distinction can be made by means of a color test: with a Feigl solution, aragonite turns black, while calcite remains colorless. In addition, aragonite is slightly harder than calcite and can be determined via a scratch test which mineral is involved. A third distinguishing method is the habit: aragonite usually grows in needle-shaped crystals (acicular), while calcite has a leaf-shaped habit. With the help of powder diffraction, the difference can be clearly determined because aragonite has an orthorhombic structure and not a trigonal structure like calcite. Aragonite is always formed at low temperatures close to the earth's surface. Aragonite is found in geysers, hot springs, caves, as oölites in shallow seas, in shells and in pearls. Locations in Europe are Aragón (Spain), Limousis (France), Girgenti (Sicily), Bilin (Bohemia) and Eisenertz (Austria).

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