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Are they fossils? - Looks like broken shells


sacchers

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Hi guys,

fossil newbie here. :)

 

I found this stones in the dolomites (3000m over sea level), really close to an almost extinguished glacier.
They looks like broken shells on the stone.

The one on the right (in the pic) looks like a coral.

Do you think they are fossils?
 

Many thanks in advance! 

 

IMG_20180824_171645.jpg

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Welcome to TFF!

Sorry, but these are not fossils.

What You found are crystals. It looks like some quartz and mostly calcite.

Nice mineral specimens.

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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Well, i'm not specialist, but i think it is a particular way of crystalization of Gypsum, in french we call it : Rose des Sables (Sands Rose).

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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11 minutes ago, fifbrindacier said:

Well, i'm not specialist, but i think it is a particular way of crystalization of Gypsum, in french we call it : Rose des Sables (Sands Rose).

Wrong environment for gypsum. 

In US we call the gypsum crystals "desert roses".

Calcite has over 120 crystal habits (shapes) it can form.

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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Evaluate the "bladed" forms for characteristics of siderite. I can't quite tell the angles, edges, &  any curvature of the faces.

“Beautiful is what we see. More beautiful is what we understand. Most beautiful is what we do not comprehend.” N. Steno

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7 minutes ago, sTamprockcoin said:

Evaluate the "bladed" forms for characteristics of siderite. I can't quite tell the angles, edges, &  any curvature of the faces.

Siderite is an iron mineral and has a dark gray to silvery color.

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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22 minutes ago, sTamprockcoin said:

Evaluate the "bladed" forms for characteristics of siderite. I can't quite tell the angles, edges, &  any curvature of the faces.

 

13 minutes ago, ynot said:

Siderite is an iron mineral and has a dark gray to silvery color.

I also thought about this, but the color is wrong.

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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37 minutes ago, ynot said:

Wrong environment for gypsum. 

In US we call the gypsum crystals "desert roses".

Calcite has over 120 crystal habits (shapes) it can form.

I knew calcite could have the look of Diamonds, grape, hedgehog's spines, dog's teeth, but not that one.

theme-celtique.png.bbc4d5765974b5daba0607d157eecfed.png.7c09081f292875c94595c562a862958c.png

"On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry)

"We only well see with the heart, the essential is invisible for the eyes."

 

In memory of Doren

photo-thumb-12286.jpg.878620deab804c0e4e53f3eab4625b4c.jpg

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Possibly dolomite crystals in the dolomites? ;)

Take one of the plates and put a few drops of vinegar on it - what happens?

Franz Bernhard

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Welcome to the forum from Sunny Florida! Closer photos of each with help us see the crystal structure. The bottom one sure resembled desert rose but I'm not familiar with your area and @ynot said no gypsum there. Calcite-Dolomite is a good possibility. (see below)

  image.png.52a6591aa8ef29c27821f96607344d48.png

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