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Also expected: Sage / Sweetgrass from the U.S.A., Nag Champa from India and pink Amethyst from Patagonia in Argentina. Order in the webshop and with DHL from € 500, - delivered FREE in NL, Belgium, France, UK, Austria & Ireland. Or call for an appointment in Berghem.(Wednesday 28th september  and saterday 03rd october we are closed)

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Zebra Calcite raw in XXL size, The trademark of Chihuahua in Mexico.

Zebra calciet XXL_product

Zebra Calcite raw in XXL size, The trademark of Chihuahua in Mexico.

Product

Zebra Calcite raw in XXL size, The trademark of Chihuahua in Mexico.

Description

New Calcite species in 2020 in addition to green, blue, red and rainbow, the Zebra Calcite forms a natural combination of Orange Calcite with black and white striped Calcite. Very nice, as yet only to be found as cut objects.

Dimensions

150-200 mm

Prijs elders

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More information

The mineral calcite (also called calcite) consists mainly of the salt calcium carbonate (CaCO3) and is one of the most common minerals in the earth's crust. Calcium carbonate arises because soluble calcium ions come into contact with CO2 (carbon dioxide forms a carbon ion if there is a positive ion in a solution). Calcium carbonate is a sparingly soluble salt, causing the CaCO3 formed to precipitate; this is done according to the following reaction: Ca2 (aq) CO32- (aq) - → CaCO3 (s). Calcite has a Trigonal crystal system and belongs to the space group R-3c. A very pure form of calcite is also called double-blasting due to the double refraction of light in this mineral. It has a romboedrical structure and is sometimes found as romboedric prisms, but it is also often found in other forms, such as scalenoid, or in fiber, grain, or compact form. The crystal structure is mainly due to the temperature, degree of supersaturation in the vicinity of the crystal and the CO2 pressure. The calcite structure is the stable modification of CaCO3 at room temperature. There is another form, aragonite, which changes to calcite at 743K. In pure crystalline form, calcite is clear, colorless translucent, but due to impurities (such as copper or sodium salts) it can take on all kinds of colors, such as gray, blue, violet, green and even black. It is often also opaque white. The mineral can exhibit both phosphorescence and fluorescence. The hardness is by definition 3. Calcite is strongly birefringent. This optical property was first described by Rasmus Bartholin when the Icelandic form of the mineral, which consists of large crystal clear romboëders, became available. Christiaan Huygens gave the first explanation with his wave theory of light. Calcite is a common constituent of sedimentary rocks, of veins and in deposits in hot springs and cavities (as a dripstone). It is the mineral that forms limestone and therefore the most common mineral of biological origin. Calcite is the main constituent of limestone, chalk and marble and it is also an important constituent of marl, limestone and limestone. Calcite is responsible for the chemical weathering of coagulation and metamorphic rocks, creating sedimentary rocks. Calcite is soluble under light pressure in CO2-containing water. During the fall in the air, rainwater absorbs the gaseous carbon dioxide, making it acidic. This acid rainwater is able to dissolve lime. In underground currents, this material can transport in solution until, after contact with atmospheric pressure, CO2 escapes and the calcite precipitates. This is how stalactites and stalactites are formed in caves.

STRONG TRADEMARKS TIMMERSGEMS GROUP