Pseudo-stromatolite, extra large Chalcedony nodules It more frequently grows cubic

It more frequently grows cubic crystals

Prehnite and epidote commonly grow together because they have similar chemical requirements (both need calcium and aluminum

a semi-transparent interior with a dark brown border

The nodules are actually believed to be a fossil pseudomorph of prehistoric sponge colonies dating back to the Upper Cretaceous period

due to its distinctive radial starburst pattern on a dark chocolate-brown and red-tinted background

Pseudo-stromatolite, extra large Chalcedony nodules It more frequently grows cubicLocale: Morocco Approx dimensions: 8 x 6 x 4" Approx weight: 8 lbs 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, cyanobacteria grow in