Please help me identify my rocks!

[corrado33]

Hey guys, I went on a rock finding mission the other day, and found two types of rocks. I want to know if I can use them. I did the vinegar test and it didn't bubble. Here are the pics..

Thanks in advance!

 

[Aquarium1]

Not 100% sure, but I think most of em are slate.

 

[ccCapt]

Probably fine for f/w, but I would not use them in saltwater for fear of them leaching out metals.

 

[Blueiz]

Looks like slate or shale, will be fine for fw.

 

[mfdrookie516]

some of it looks like sandstone too... there's one black piece that looks like a type of sandstone i have in my tank.

 

[corrado33]

some of it looks like sandstone too... there's one black piece that looks like a type of sandstone i have in my tank.

Sorry but that's doubtful. All of the "black" stones are the same, and all of the "tan" stones are the same. So if one black stone is slate, the others are the same. Thanks though, I really appreciate it.

 

[coke-g]

I agree with everyone else looks like sandstone & slate. Should be ok in FW tank as i have both types in mine.

 

[CA_BroncoFan]

Im with A1, it looks like black shale.....or slate

 

[Aquarium1]

Idk where you all are seein any sandstone lol. No offense. I'm still unsure how to tell the dif between shale and slate lol.

 

[CA_BroncoFan]

Shale is a lot more flakey and thinner pieces can sometimes be broken by hand, when I get home ill post a pic.

 

[Aquarium1]

ok cool. Thanks. I guess I have mostly slate in my tank then.

 

[CA_BroncoFan]

Yeah shale from what I've read is a form of slate just "grown" or composed slightly different giving it some similar colors just a slightly less durable feel.

 

[Reverend Turtle]

Def. slate. The other reminds me of petrified wood we used to sell at the lfs I worked at.