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This material has the tendency to be crumbly
In this specimen
Pyrite from the Potosí Mine is known to pseudomorph after pyrrhotite in this hexagonal formation
Sure you could make your own for free
Pseudo-stromatolite, extra large Dragon's Blood Jasper This material has the tendencyLocale: Morocco Approx dimensions: 6 x 5. 75 x 4" Approx weight: 4 lbs 7 oz A stromatolite is a sedimentary fossil structure made by prehistoric bacteria colonies, typically cyanobacteria. Stromatolites in fact are still living and forming in some parts of our world today, including Australia, and are among the earliest forms of lifeand fossilson our Earth. The fossils form in shallow water conditions of lakes or salt water shores. First,
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