r/whatsthisrock is a subreddit with 673k members. The community frequently discusses rock, found, found in, identify, and what, and the most common flair used is request and identified.
Dedicated to identifying mysterious rocks and minerals.
Popular Topics in r/whatsthisrock
#1
Rock
248 posts
#2
Found
211 posts
#3
Found In
64 posts
#4
Identify
55 posts
#5
What
27 posts
#6
What Is
23 posts
#7
Stone
23 posts
#8
Beach
22 posts
#9
Type
21 posts
#10
Find
19 posts
Flair Used in r/whatsthisrock
#1
REQUEST
: "What is this? I found this in a river in Ontario Canada"
198 posts
#2
IDENTIFIED
: "Both labeled as western sunrise - but they’re so different (repost to adhere to rules!)"
2 posts
Member Growth in r/whatsthisrock
Yearly
+113k members(20.3%)
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About
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Last updated: July 1, 2026