So what is this?

[tonydrocks]

Just found it. Clear and brown. I found it in the ocean cliffs in LA, CA

 

[Eu_citzen]

Need better pictures. Also, do a hardness test; will a knife scratch it? Will a quartz scratch it?

 

[tonydrocks]

Here is a higher def. video of what I found. I found them in LA on a cliff near the ocean. I would really appreciate an ID on them, they look really cool.