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Coral?


dani

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I just joined this forum so first I want to say hello to eveyone!

Next, I found this on the Black Sea beach, it probably come out from the sea. Since the shape is not conical I posted two pictures showing both sides. Other informations: it is 4.5 cm high; a small part is measing so I can not say how thick is at the base but at least 1 cm ; Is quite heavy and is easy to break. Thanks!

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post-14729-0-17262200-1395054495_thumb.jpg

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In the images, the structure seems bone-like.

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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gypsum crystals? Can you scratch it with your fingernail?

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

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Hi,

The structure looks like the aragonite or quartz.

It isn't "volcano banacle" because this is a "cirripède" (in french). It is shellfish constituted by numerous small plates, while the shown element seems in a single part.

Coco

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Can you scratch it with your fingernail?

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

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Hello again and sorry for the delay.

To Herb: yes, you can detach with your fingernail small fragments, not extremely easy but you can do it.

In fact, when I found this piece I lift it from the sand and instinctively I tried to break it, and it was easy to split it in two fragments. Ofcourse, when I realize it maybe something interesting I was not so happy.

I intend to go to the geology museum and ask them for an opinion.

I'll be back with their opinion.

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If you can scratch it with your fingernail it is probably some form of gypsum crystals.

"Absence of evidence is not evidence of absence"_ Carl Sagen

No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go.

" I think, therefore I collect fossils." _ Me

"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes

"can't we all just get along?" Jack Nicholson from Mars Attacks

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  • 1 month later...

I have an answer. It is phosphorite.

I showed the sample to a paleontologist.

For rock identification what book would you recommand (beginner level) ?

Daniela

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