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Spanish amber- amber from Northern and Eastern Spain, Cretaceous (Albian) in age. Sri Lankan amber - found in sea coast in a very small quantity also called Indian amber or Indian sea amber. Sumatran amber - found in Jambi, Indonesia this amber is a young amber, typically falling in the 20-30 million year age range.
Amber is heterogeneous in composition, but consists of several resinous bodies [clarify] more or less soluble in alcohol, ether and chloroform, associated with an insoluble bituminous substance. Amber is a macromolecule formed by free radical polymerization [22] of several precursors in the labdane family, for example, communic acid, communol ...
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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.
Blue amber is a rare variety of amber resin that exhibits a blue coloration. Blue amber has been most commonly found in the Dominican Republic—especially in the amber mines around the city of Santiago and, less commonly, in the eastern half of the country. In the modern age, it was discovered at about the same time as Dominican amber. [1] [2] [3]
The Guadalupe Victoria site is an outcrop of amber bearing strata belonging to the Mazantic Shale and Balumtum Sandstone. The deposits preserve a transitional river or stream environments near the coast and preserves fossils of a mangrove forest ecosystem. [10] Asteromites mexicanus is an epiphyllous coelomycetes fungus species recovered on a ...
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.