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Identity Helprookie needs help
7th Mar 2012 00:41 UTCmatthew spraker
7th Mar 2012 01:08 UTCDon Saathoff Expert
A bit more information would help. First, your photos are great but we need some diagnostic data: can you make a scratch in the specimen (that will catch your fingernail) with a knife blade? Will it scratch glass? Does it leave a colored streak on unglazed porcelain (the underside of your toilet tank cover)?
A first guess would be chert. I don't see a cleavage, just some cracks and spalling and a hint of a conchoidal (shell-like) fracture.
Get back to us with some more data.....
Don
7th Mar 2012 01:40 UTCJosé Zendrera 🌟 Manager
In addition to what Ron said, to discard limestone you can do a test with hydrochloric acid or vinegar (bubbles).
We wait for your news...
7th Mar 2012 02:03 UTCPaul Brandes 🌟 Manager
That would not be unheard of in SW Virginia....
7th Mar 2012 02:19 UTCCraig Mercer
Welcome to mindat Matthew, and goodluck.
7th Mar 2012 03:30 UTCmatthew spraker
7th Mar 2012 03:55 UTCNorman King 🌟 Expert
Good work in finding that and doing the analyses!
7th Mar 2012 05:05 UTCKeith Wood
Good job using the testing methods, and welcome to Mindat.
8th Mar 2012 00:50 UTCJosé Zendrera 🌟 Manager
8th Mar 2012 04:07 UTCJim Bean 🌟
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