r/whatsthisrock is a subreddit with 664k members. The community frequently discusses rock, found, found in, identify, and what, and the most common flair used is request.
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? It’s from my dads collection & he thinks it might be worth something"
200 posts
Member Growth in r/whatsthisrock
Yearly
+115k members(21.0%)
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About
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Last updated: June 9, 2026