Traviscounty Posted July 23, 2009 Share Posted July 23, 2009 This one kinda has the same black (tourmaline?) spears. It flakes off rather easily, and It's hard to see in the pic, but it's shiny all over. Link to comment Share on other sites More sharing options...
Shamalama Posted July 23, 2009 Share Posted July 23, 2009 Not Tourmaline.... Aegerine maybe? I've seen that before but the name escapes me at the moment. -Dave __________________________________________________ Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPheeIf I'm going to drive safely, I can't do geology. - John McPheeCheck out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/ Link to comment Share on other sites More sharing options...
fig rocks Posted July 23, 2009 Share Posted July 23, 2009 Not Tourmaline.... Aegerine maybe? I've seen that before but the name escapes me at the moment.I don't think is aegerine, here is a sample of some from Mt. Malosa, Malawi Link to comment Share on other sites More sharing options...
fig rocks Posted July 23, 2009 Share Posted July 23, 2009 I don't think is aegerine, here is a sample of some from Mt. Malosa, Malawi looking at your sample more closely I see that it may have the same crystal structure of aegerine Link to comment Share on other sites More sharing options...
2ynpigo Posted July 24, 2009 Share Posted July 24, 2009 Looks like a quartz-muscovite-hornblende schist. The black crystals look like hornblende. I see no striations. I think I see a 4-sided cross-section on one of the crystals. Link to comment Share on other sites More sharing options...
MOROPUS Posted July 24, 2009 Share Posted July 24, 2009 Looks like a quartz-muscovite-hornblende schist. The black crystals look like hornblende. I see no striations. I think I see a 4-sided cross-section on one of the crystals. Be carefull with hornblende material; sometimes is very radioactive! Link to comment Share on other sites More sharing options...
barefootgirl Posted July 24, 2009 Share Posted July 24, 2009 Be carefull with hornblende material; sometimes is very radioactive! That would explain some things! In formal logic, a contradiction is the signal of defeat: but in the evolution of real knowledge, it marks the first step in progress toward victory. Alfred North Whithead 'Don't worry about the world coming to an end today. It's already tomorrow in Australia!' Link to comment Share on other sites More sharing options...
Frank Menser Posted July 24, 2009 Share Posted July 24, 2009 Looks like a quartz-muscovite-hornblende schist. The black crystals look like hornblende. I see no striations. I think I see a 4-sided cross-section on one of the crystals. Agreed... Anyone glowing in the dark yet? Be true to the reality you create. Link to comment Share on other sites More sharing options...
2ynpigo Posted July 25, 2009 Share Posted July 25, 2009 Never heard of radioactive hornblende. Link to comment Share on other sites More sharing options...
Auspex Posted July 25, 2009 Share Posted July 25, 2009 How 'bout pitchblende? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
2ynpigo Posted July 25, 2009 Share Posted July 25, 2009 How 'bout pitchblende? Pitchblende (uraninite) would be radioactive. But the black "spears" are not uraninite. Link to comment Share on other sites More sharing options...
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