Dinosaur Bone Gemstone / Polished Dinosaur Bone Cabochon
Dinosauria indet. (specifically permineralized cancellous and compact bone tissue) • Permineralized body fossil (vertebrate bone)
Geological Period
Mesozoic Era (specifically Jurassic to Cretaceous)
Estimated Age
66 to 150 million years
Preservation Type
Permineralization / Replacement with silica (silicification/agate replacement)
Condition Assessment
Excellent, expertly cut and polished cabochon with high-gloss finish, stable structure, and no visible fractures or surface pitting
Taxonomic Classification
Phylum Chordata, Class Reptilia, Superorder Dinosauria
Morphological Description
Polished oval cabochon displaying distinctive cellular bone structure, showing cellular pore spaces filled with microcrystalline quartz (agate/jasper) replacement, with contrasting dark and amber-orange zones delineating original trabecular bone patterns.
Rock Matrix
Microcrystalline quartz and chalcedony matrix replacing original biological tissues, highly polished display piece without native host rock
Formation & Location
Morrison Formation (Western United States) or similar fluvial depositional environments worldwide
Size & Dimensions
Approximately 25mm to 40mm in length for the main cabochon, typical for cut lapidary display specimens
Value & Rarity
Estimated Market Value
$50 - $150 USD
Auction Estimate
$40 - $120 USD
Rarity Assessment
Uncommon as high-quality gem silica-replaced dinosaur bone suitable for lapidary work, though bone fragments themselves are relatively common
Scientific Significance
Demonstrates exceptional diagenetic replacement processes where cellular bone structures are perfectly preserved in microcrystalline quartz, providing insights into fossilization micro-environments
Preparation Recommendations
Store in stable temperature and humidity conditions away from direct sunlight; clean gently with a soft, damp cloth if necessary
Notable Features
Striking natural contrast between amber-orange and dark brown/black cellular networks, creating a scenic or stained-glass visual effect within the polished gemstone