Rocks I have found

Okay here we go, I live in middle TN and there is limestone every where and I have a beautiful creek in my back yard that I'll walk through and gather nice looking specimens that I will take home and clean, clean, and clean some more. Well I want to know if they would be okay to use as base rock (once I get to fifty posts I will post some of the pieces I have that I can sell or trade, but that's here nor there.) Here are some pictures of the ones I would really like to use.

I have more pics but the site is giving me trouble so I'll post this then add the others.

 

Looks like Texas holey rock. Great for cichlid tanks. I've seen it used in reef before and it works but the typical live rock we use has way more surface area on it.

 

Agreed, I think mine looks like very old Coral skeleons of various kinds.

Those do look great for FW tanks though, and as said, would probably work on SW too.

 

Cool rock... it wouldnt go in my tank tho.

 

Correct. Most marine rock is arogonite (calcium carbonste) and very porous, which is why filtration is so great.

Texas Holy rock is likely siliceous (silicone dioxide) and not very porous. Could be igneous or sedimentary.

Check your local mining regulations before harvesting and selling rocks. You may need permitting You don't want state agencies on your door step.

 

Here are the other rocks. still having a hard time on the next few haha.

 

Hmmm... kinda curious how Texas holey rock found its way into a Tennessee limestone field. IMHO, they appear to be CaCO3 rather than SiO2.

 

In review, Texas holey rock is limestone. The cavities are formed from sulfuric acid. Texas holy rock is likely a term thrown around like SPS is for stony corals.