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    Amber is fossil tree resin. Although not mineralized, it is often classified as a gemstone. A common misconception is that amber is made of tree sap; it is not. Sap is the fluid that circulates through a plant's vascular system, while resin is the semi-solid amorphous organic substance secreted in pockets and canals through epithelial cells of the plant. Because it used to be soft and sticky tree resin, amber can sometimes contain insects and even small vertebrates.

    Amber

    Hidden world: Another type of fossil resin, Colombian Amber, in egg form (fossils are more common in Dominican & Columbian resins).

    fossils

    Common Fossils

    Fossil Eocene bird 48 million years old | (from Flickr)

    Turritella fossils, handwritten labels

    amber

    Amber with Insects.

    “A fossil with a beautiful name: Silvanerpeton miripedes, meaning Wood Crawler with Wonderful Feet. #FossilFriday

    Twitter / Aoibh_G: Lovely trace fossil Cruziana ...

    Adam Peel on Twitter: 80 million year old palaeoctopus newboldi from NHM placement last week,shown to us by @NHM_Cephalopoda #fossilfriday

    Ammonite with Dendritic suture patterns - 110 million years old

    ammonite fossil

    WOW!!! Giant Ammonite, Lyme Regis by blinkingidiot, via Flickr

    Insect preserved in Amber

    Fossil--Conus puschi (Mioceno)

    Tanzanite. that blue is so pretty. #GemstoneSerendipity #gems #minerals #fossils #rocks

    Twitter / Ferpertier: That's a complete Haugia jugosa ...

    Ammonite Fossil

    Insect in Amber