Are these rocks safe?

[connorlindeman]

Today I went to the mountains to find some rocks for my fish tanks.

I was searching most for rocks for my 40g cichlid tank.
Some of the rocks have some white "crystal" like rock mixed with the rock. This will only affect hardness right? So with my cichlid tank it shouldn't be a problem?

Here's some pics of the rocks.

Do they look safe to you?


This one has some of what seems to be lichen. Is it safe?

Also, I found these rocks. They are interesting looking. Any idea what type they are?

 

[Stan510]

They look like granite..should be fine. If you rub a finger on found rocks and it gives off some color when wet? Probably some kind of sandstone. Those are iffy.

 

[connorlindeman]

They look like granite..should be fine. If you rub a finger on found rocks and it gives off some color when wet? Probably some kind of sandstone. Those are iffy.

great thanks!

 

[Sgooosh]

great thanks!

the lichen will probably die under water...

make sure to get all the dirt off... (the granite where i am is lighter, when i went to check ur location, that was funny lol!)

 

[connorlindeman]

the lichen will probably die under water...

make sure to get all the dirt off... (the granite where i am is lighter, when i went to check ur location, that was funny lol!)

Im in the garden state ;-)

 

[Sgooosh]

Im in the garden state ;-)

that is right behind CA lol

 

[connorlindeman]

that is right behind CA lol

The rocks are from ny

 

[Sgooosh]

The rocks are from ny

cool, inter-country edit: rocks from across the country
how'd you get em

 

[connorlindeman]

cool, inter-country edit: rocks from across the country
how'd you get em

The garden state is NJ lol. I'm right next to the border

 

[Sgooosh]

The garden state is NJ lol. I'm right next to the border

my bad
i thought it was AZ for some stupid reason

 

[connorlindeman]

my bad
i thought it was AZ for some stupid reason

Arizona is practically the desert state lol