The 3-drawings (A, B, C, and D) that look down through C-axis showing crystal faces as they develop is worth a thousand words (or more). Excellent tutorial, Dick!
Thanks Richard. I've noticed some hexagonal cross sections in xls but read where books and experts said " it's tetragonal.". So I was bewildered. Frank Mazdab helped with a similar explanation to me just last week on Mindat. But 2 explanations are better than one. I appreciate it.
Thanks for reminding me. I encountered scapolite in veiny (not an official word) pockets in calcarious amphibolite. There was pyroxene in the edges of the pockets as well as greenish layers in the amphibolite. There was also epidote in the pockets themselves along with the scapolite. Puzzeled over it for a long time. If I remember correctly, it had an odd bluish birefringence. I thought the pockets might have been what was left of the spaces between pillows, but now I think they were where the amphibolite was broken.
The 3-drawings (A, B, C, and D) that look down through C-axis showing crystal faces as they develop is worth a thousand words (or more). Excellent tutorial, Dick!
Thanks!
Thanks Richard. I've noticed some hexagonal cross sections in xls but read where books and experts said " it's tetragonal.". So I was bewildered. Frank Mazdab helped with a similar explanation to me just last week on Mindat. But 2 explanations are better than one. I appreciate it.
Thanks for reminding me. I encountered scapolite in veiny (not an official word) pockets in calcarious amphibolite. There was pyroxene in the edges of the pockets as well as greenish layers in the amphibolite. There was also epidote in the pockets themselves along with the scapolite. Puzzeled over it for a long time. If I remember correctly, it had an odd bluish birefringence. I thought the pockets might have been what was left of the spaces between pillows, but now I think they were where the amphibolite was broken.
I should add this was Columbus, GA, not Montana.