sedimentary/fossil
Dinosaur Bone
Agatized Dinosaur Bone
Hardness varies depending on the replacing minerals (often quartz/agate, hardness 6.5-7). Color varies widely based on impurities (yellow, brown, red, black). Often shows cell structure of the original bone.
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Physical properties
Hardness varies depending on the replacing minerals (often quartz/agate, hardness 6.5-7). Color varies widely based on impurities (yellow, brown, red, black). Often shows cell structure of the original bone.
Formation & geological history
Formed through the process of permineralization, where groundwater carrying dissolved minerals like silica seeps into buried dinosaur bones. The minerals precipitate in the pore spaces, replacing organic material over millions of years.
Uses & applications
Mainly used in lapidary arts for cabochons, jewelry, and collecting. Also holds scientific value for paleontological studies.
Geological facts
Also known as 'gembone', it's one of the few fossils commonly cut and polished for jewelry. The intricate patterns are the preserved cell walls of the original dinosaur bone.
Field identification & locations
Identify by looking for the distinct cellular or spongy structure (trabecular bone). Often found in the Morrison Formation in the western United States (Colorado, Utah, Wyoming).
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