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the dark lines are composed of spheres that appear a dark olive green color and almost metallic luster with radial growth
This is one of my favorite specimens of Erongo hyalite
Approx dimensions: 1
possibly another shift in growing conditions causing a transition from hyalite to a different type of quartz
the piece would not lose any key features without it
Pseudo-stromatolite, extra large Geode the dark lines are composedLocale: Morocco Approx dimensions: 5. 5 x 5 x 4" Approx weight: 6 lbs 11 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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