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Mexican amber. Mexican amber, also known as Chiapas Amber is amber found in Mexico, created during the Early Miocene and middle Miocene epochs of the Cenozoic Era in southwestern North America. As with other ambers, a wide variety of taxa have been found as inclusions including insects [1][2][3][4][5] and other arthropods, [6] as well as plant ...
Open pit amber mine in Kaliningrad, showing the lithology of the Prussian Formation, the source rock of Baltic amber. In situ Baltic amber is derived from the sediments of the geological formation termed the Prussian Formation, formerly called the "Amber Formation", with the main amber bearing horizon being referred to as "Blue Earth", so named due to its glauconite content.
Liquidambar styraciflua is a medium-sized to large tree, growing anywhere from 15–20 m (50–70 ft) in cultivation and up to 45 m (150 ft) in the wild, [14] with a trunk up 60–90 cm (2–3 ft) in diameter, on average. [15] Trees may live to 400 years. [16] The tree is a symmetrical shape and crowns into an egg shape when the branches get ...
See also: List of special economic zones and List of free-trade zones In special economic zones business and trades laws differ from the rest of the country. The term, and a number of other terms, can have different specific meanings in different countries and publications. Often they have relaxed jurisdiction of customs or related national regulations. They can be ports or other large areas ...
Amber is a macromolecule formed by free radical polymerization [ 24 ] of several precursors in the labdane family, for example, communic acid, communol, and biformene. [ 25 ][ 26 ] These labdanes are diterpenes (C 20 H 32) and trienes, equipping the organic skeleton with three alkene groups for polymerization.
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Hand-coloured photograph of the original Amber Room, 1931 Autochrome of the Amber Room in the Catherine Palace, 1917 Reconstructed Amber Room, 2003. The Amber Room (Russian: Янтарная комната, romanized: Yantarnaya Komnata, German: Bernsteinzimmer) was a chamber decorated in amber panels backed with gold leaf and mirrors, located in the Catherine Palace of Tsarskoye Selo near ...
The amber itself is primarily disc-shaped and flattened along the bedding plane, and is typically reddish brown, with the colour ranging from shades of yellow to red. The opacity of the amber ranges from clear to opaque. Many amber pieces have thin calcite veins that are typically less than 1 mm (0.04 in), but up to 4–5 mm (0.16–0.20 in) thick.