Help With These Rocks?

[aaronjunited]

I have some pictures here, i collected this lot from the beach. No idea wat so ever what any of them are, hopefully someone can help.

rock 1

rock 2

rock 3

rock 4

rock 5

rock 6

rock 7

rock 8

different view of rock 8

rock 9 - looks like slate??

rock 10

Please can someone identify if these may be safe in an aquarium, and what they are.
Thanks.

 

[-FighterFishh]

I don't have a clue, I'm afraid, but rock 10 is really nice.
I'd be a little wary of rocks found on the beach, so asking was a good move
Hopefully someone can come identify them for you

 

[aaronjunited]

Thanks mate, most people on other forums told me rock 10 wasnt nice lol.
Bring the rock experts on here.

 

[dayzofspeed]

rock 9 is slate 10 is an eroded housebrick

 

[fluttermoth]

I'm not a rock expert, but I can tell you that rock 9 is slate and rock 10 is almost certainly, um, house brick...

 

[Curiosity101]

Check them with vinegar and so long as none of them fizz then they'll be fine in a tank. Just give them a good scrub in hot water to make sure you've removed any dirt etc.

 

[aaronjunited]

Thanks people, is there any rock experts on here, or people that know by looking through experience.

Thanks agian.

 

[Skins]

Pics1,2,3,5,and 7 look like granite and the last one could be sand stone.

Keith.

 

[aaronjunited]

Cool granite is safe then, i have a bit of granite actually i got from a landscaping centre. Will compare them too see if they are farmiliar.
Thanks.

 

[fluttermoth]

Pics1,2,3,5,and 7 look like granite and the last one could be sand stone.

Keith.

They don't look anything like granite to me

This is what granite looks like ; http/geology.about.com/od/rocks/ig/igrockindex/rocpicgranite.htm

The last one is house brick though, I'm 99.999% certain.

 

[Haveagojoe]

As already said the last one looks like an old housebrick a definite no no, test with vinegar with the others, if they fizz discard but to me they look non permiable (safe).

 

[aaronjunited]

I'l do the tests on them.

Thanks for the help everyone, and anyones elses help is still needed.

 

[fluttermoth]

Wherabouts did you collect them? There are some pretty good geological maps you can look at online.

Also, I've never found the vinegar test very helpful; acetic acid is really too weak to be effective. Best thing to do is test the pH (and hardness if you have a DH or GH test) of a bucket of water, dump the rocks in and test again in a couple of days and see what's happened.

 

[Skins]

I'm no rock expert but some of these samples do look like volcanic granite i've seen on Ben Nevis.

Keith.

 

[Aqua Tom]

Test them all with vinegar if it dosnt fizz then it ok to use.

I would personaly be very wary of anything that came from the sea.