Amber, fossil tree resin that has achieved a stable state through loss of volatile constituents and chemical change after burial in the ground. Amber occurs as irregular nodules, rods, or droplike shapes in all shades of yellow with nuances of orange, brown, and, rarely, red.
Mid-Cretaceous amber inclusions reveal morphogenesis of extinct rachis-dominated feathers
What Is Amber? Ancient Carved Ambers in the J. Paul Getty Museum
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PPT - Amber PowerPoint Presentation, free download - ID:1942736
Baltic amber - Wikipedia
Amber
PPT - Amber PowerPoint Presentation, free download - ID:1942736
What are the most valuable pieces of amber? - Quora
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What is amber and how does it preserve animals and plants for so long? - Discover Wildlife
How is amber able to preserve stuff so well but not things fossilized in rock? - Quora
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