Dinosaur Bone Fragment - Fossil Specimen one of a kind hedenbergite and with the streak plate

and with the streak plate its really all you need as everything is intuitively labelled

depositing silica over time

Approximate Size for 1 piece: 18cm x 9cm x 9cm

and this specimen shows it well in a compact

Description: This specimen displays classic “Mercedes” calcite

Dinosaur Bone Fragment - Fossil Specimen one of a kind hedenbergite and with the streak plateMined from: Morrison Formation, Utah, U. S. A. Era: Mesozoic Geological Age: 155148 mya Description: This one of a kind dinosaur bone fragment from Utah has a polished face with deep black, dark brown, rusty red, grey, and golden tan mineral areas. The piece keeps its rough natural bone exterior along the top and sides, while the cut surface shows the heavier mineral replacement and preserved internal bone texture. Its flat base gives it a strong