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Description
Pseudo-stromatolite, extra largeLocale: Morocco Approx dimensions: 7 x 6. 25 x 4" Approx weight: 9 lbs 12. 5 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,
Locale: Morocco
Approx dimensions: 7 x 6.25 x 4"
Approx weight: 9 lbs 12.5 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 life—and fossils—on our Earth.
The fossils form in shallow water conditions of lakes or salt water shores. First, cyanobacteria grow in microbial mats. Minerals like calcium carbonate precipitate (crystalize from the water) onto the surface of the mat. The bacteria acts as a glue, cementing it all together with sedimentary debris. Layers build up over time like a bacterial pearl; the name “stromatolite” appropriately means “layered rock” in Greek.
This, however, is not a stromatolite. They are commonly believed to be stromatolites, and you will more often than not see them sold under that name and description. More accurately, they are concretions formed out of beautiful tones of red sandstone material. These sandstone concretions form in a manner similar to stromatolites, but minus the aid of bacteria: mineral-rich waters precipitate barite which binds with sand to form concentric layers around a nucleus. It is a relative of the barite desert rose, which grows clusters of round blade-like ‘petals.’
This specimen makes for an inexpensive large piece to add to your mineral collection or use as decor around the home. While pseudo-stromatolites typically have a rounded or conical back, this specimen is wide and flat like a lopsided cake with round nubbins attached to the side.
UV reactivity Many pseudo-stromatolites from Morocco have faint to moderate white fluorescence and light yellow-green phosphorescence under 365 nm UV light. This specimen has good reaction, with phosphorescence apparent.
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4.3 ★★★★★
Based on 24 reviews
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Product Reviews
★★★★★ 5
My paper bowls of choice.
Size: 50 Count
I have been a return buyer of these bowls and amazon basics plates, as they are sturdy and well made, even for liquids. I think there is a generous quantity for the price. I use for my to go meals on the way to work, so I dont have my whole kitchen accumulating in my car. They are good sized and you can fit a decent serving. Will keep buying.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Sturdy paper bowls, economical quantity purchase
Size: 300 Count
I previously bought 50 (?) of the paper plates to check the quality and see how well they hold up before making quantity purchases of other paper products. The bowls hold up well though I use them primarily for cut up avocados, sliced tomatoes, cole slaw, etc. I have used them in the microwave under 15 seconds to reheat toasted English muffins with marmalade with no problem. I use Pyrex glass bowls in the microwave for veggies and soups, so I am unable to speak on how well the bowls hold up with hot foods in the microwave.
I resisted buying and using paper bowls and plates for a long time; however, with my 80th birthday fast approaching, the fewer dishes I have to wash means less time standing on my feet.
I am an experienced shopper, and these quality paper products bought in bulk are the best buy I have found. I recommend them.
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Reviewed in the United States on March 18, 2026
★★★★★ 4
My go to.
Size: 50 Count
Nice. Sturdy and good thickness. Nice size. Bought these along with smaller. Leak proof.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Strong and very convenient
Size: 50 Count
These paper bowls are sturdy and hold up well even with hot or liquid foods. They don’t get soggy easily and are microwave safe, which makes them very convenient. The size is also great for soups, cereal, or leftovers. Good quality for disposable bowls and very practical for everyday use.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Sturdy, great value, very utilitarian
Size: 50 Count
Exactly what I wanted. Exact quality thickness and sturdiness. Only small downside is they're coated in a wax like substance and stick together so you have to pry them apart and if you microwave something, it tends to meld together and also stick into the bowl. But I still love them especially the price.
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Reviewed in the United States on March 30, 2026
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