Thanks Richard. I have some, somewhere and wondered about it. I read a little, but it didn't explain it as well as you did. When I got some, I thought " , It's not black and it's not a mica. I hate these names.". Now that 'burns black' makes sense.
This boulder I've got is loaded with iron sulfates, not just halotrichite. It has really been good to get me into studying sulfates, which are pretty ignorable most of the time.
Thanks Richard. I have some, somewhere and wondered about it. I read a little, but it didn't explain it as well as you did. When I got some, I thought " , It's not black and it's not a mica. I hate these names.". Now that 'burns black' makes sense.
This boulder I've got is loaded with iron sulfates, not just halotrichite. It has really been good to get me into studying sulfates, which are pretty ignorable most of the time.
Very well explained Richard. Thanks!