rock id? - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 01-25-2014, 09:06 AM Thread Starter
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rock id?

i was able to grab a couple of these rocks, from an entry road for truck drivers
to drive over so they wouldnt get stuck in the mud. i grabbed a few to see if i
could id. there are im sure over 1000 or so stones and entry is no longer
being used and if theyre tank friendly ill go back and get some that have more
character. the owner thinks they might be lime stone but doesnt know for sure.
theyre extremely hard, i tried to break the larger one with a small crowbar and
hammer and it was barely chipping. i tried to scratch it with my buckknife but
looks more like the metal it being left on the rock, wont scratch with a nail.
no fizz from vinegar. i tried to use the rock id website but couldnt figure it out.
if anyone else has any ideas let me know.

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post #2 of 7 (permalink) Old 01-25-2014, 03:18 PM
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Looks like standard basalt to me.
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post #3 of 7 (permalink) Old 01-25-2014, 08:28 PM Thread Starter
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thanks, i compared to some picks, and it looks similar. think im gonna do a bucket test
and see if ph increases.
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post #4 of 7 (permalink) Old 01-26-2014, 09:19 AM
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If you can't scratch it with steel, it's probably safe.

I think in some areas, limestone is pretty commonly used for aggregates, gravel, cobbles and such, which may be why the owner thought they were limestone. But limestone is fairly weak, it scratches easily, and shouldn't be to hard to break up.
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post #5 of 7 (permalink) Old 02-19-2014, 01:11 AM
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Any update on the PH test?

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Originally Posted by pinkman View Post
thanks, i compared to some picks, and it looks similar. think im gonna do a bucket test
and see if ph increases.
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post #6 of 7 (permalink) Old 02-19-2014, 02:48 AM
jrh
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Wouldn't scratch? Hmmmm, I actually would have guessed limestone (or maybe conglomerate -- fancy word for nature's concretes and cements) but limestone shouldn't be harder than your knife. When testing hardness, you're trying to see if you can make a little scratch, rather than if you can break or chip off a piece.

Keep us posted I'm curious now.
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post #7 of 7 (permalink) Old 02-19-2014, 03:21 AM
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If you have vinegar you can pour a little on and see if it fizzles.
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