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The most popular Products mentioned in /r/geologyporn:
The most popular Services mentioned in /r/geologyporn:
#1
500px
3 /r/geologyporn comments
#2
Flickr
3 /r/geologyporn comments
#3
Google Images
1 /r/geologyporn comment
The most popular reviews in /r/geologyporn:
1 point
·
11th Aug 2020
There are a variety of "Rocks and Minerals" booklets that are great introductions, I used this one when I was studying geology (for intro courses / identifying some stuff).
For better information youll have to get a textbook, but there are free pdfs for most of them floating around... or so I've heard.