are produced by Reichhold firm; Styresol trade mark or alkid resin (used in Russia, Reichhold, Inc. patent, 1948. Polyethylene Epoxy resins Polystyrene and polystyrene-like polymers (vinyl polymers). The resins of acrylic type (vinyl polymers), especially polymethyl methacrylate PMMA (trade mark Plexiglass, metaplex). See also Ammolite List of types of amber Petrified wood Pearl Poly(methyl methacrylate) Precious coral References Bibliography External links Farlang many full text historical references on Amber Theophrastus, George Frederick Kunz, and special on Baltic amber. IPS Publications on amber inclusions International Paleoentomological Society: Scientific Articles on amber and its inclusions Webmineral on Amber Physical properties and mineralogical information Mindat Amber Image and locality information on amber NY Times 40 million year old extinct bee in Dominican amber Fossil resins Amorphous solids Traditional medicine