✅ SOLVED what kind of rock is this?

[rockpassion]

Today i was walking on the beach of Zandvoort Langevelderslag in the Netherlands and there where no rocks on the beach. And then i spotted this strange rock which was found higher up the beach. It is very light and black of color and it seems to be made out of large grains and it has large vesicles and it not atracted to a magnet and very friable and it has a sulphur smell. What is this rock?

 

[potsherd_creek]

looks like asphalt

 

[galenrog]

looks like asphalt

Agreed.

 

[Back-of-the-boat]

Maybe pumice.

 

[rockpassion]

looks like asphalt

i have posted new photo's

 

[rockpassion]

Maybe pumice.

i have posted new photo's

 

[rockpassion]

Agreed.

it is not a fragment but a stone with a smooth outer surface. asfalt is much heavier

 

[rockpassion]

probably fossile plant material

 

[Back-of-the-boat]

Now with the new photo's I think it is a large charcoal briquet that didn't burn all the way in a campfire. Has had rain or salt air remove most of the burn off except a few gray spots. If it is charcoal it would explain the Sulphur smell also, Scratch it on some paper to see if it leaves black streaks. Also charcoal would be light enough to be wind blown up high on the beach and charcoal is put in a press to make into briquets so the smooth edges could from being presses into a form. Another test to check my theory would be to light it on fire a blowtorch flame held to it would light it if charcoal. If none of this works then I don't know.

 

[russau]

To me , it appears to be of volcanic origins !

 

[potsherd_creek]

Look up Antozonite and see if that describes it.

 

[Mdpartner]

Meteorwrong?

 

[rockpassion]

Now with the new photo's I think it is a large charcoal briquet that didn't burn all the way in a campfire. Has had rain or salt air remove most of the burn off except a few gray spots. If it is charcoal it would explain the Sulphur smell also, Scratch it on some paper to see if it leaves black streaks. Also charcoal would be light enough to be wind blown up high on the beach and charcoal is put in a press to make into briquets so the smooth edges could from being presses into a form. Another test to check my theory would be to light it on fire a blowtorch flame held to it would light it if charcoal. If none of this works then I don't know.

your wright.