What kind of rock is this?

[FlameTetra333]

Well, I was walking around my house and I found a quartz like rock, except its more whitish than transparent and it has lots or brown spots on it. I soaked it in vinegar last night and it didn't bubble, so is it okay to use? The only reason why I don't have a picture of it is because I don't know how to post pictures on here. Does anyone have a kind of rock like what I described?

 

[lauraf]

Usually if it doesn't bubble when you put vinegar on it it is inert. From your description, I'd say it's safe for your tank. Give it a boil just to be safe.
And to post pics, the easiest thing is to click the 'insert image' icon above the window you are typing in - then select the pic from your computer.

 

[FlameTetra333]

Usually if it doesn't bubble when you put vinegar on it it is inert. From your description, I'd say it's safe for your tank. Give it a boil just to be safe.
And to post pics, the easiest thing is to click the 'insert image' icon above the window you are typing in - then select the pic from your computer.

Okay. But would letting it sit in very hot water have the same effect?

 

[FlameTetra333]

Here's a pic of the rock:

 

[FlameTetra333]

Also, if I submerge the rock in conditioned water, would that neutralize any copper in the rock?