// SUBREDDIT_PROFILE
r/whatsthisrock
› Dedicated to identifying mysterious rocks and minerals.
// MEMBERS
702,059
› subscribers
// POSTS_INDEXED
7,865
› analyzed records
// COMMUNITY_AGE
13y
› since 2013-01-28
// STATUS
[ok] active
› feed indexed
// QUICK_ACTIONS
// Recent posts in r/whatsthisrock
[ latest we indexed · by upvotes ]- 01 Found this on lake erie ! ↑ 1,250 · 2026-10-23
- 02 Fond in the Conodoguinet Creek in PA ↑ 1,101 · 2026-10-09
- 03 Bought this when I was a kid ↑ 9 · 2026-11-07
- 04 Very traingular geometric rock found in upstate new york, wondering what caused it to form like this. ↑ 5 · 2026-11-08
- 05 Please help me prove my husband wrong! ↑ 5 · 2026-11-08
// RELATED_COMMUNITIES
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// FAQ [ 3 entries ]
01 › What is r/whatsthisrock about? [ expand ↓ ] [ collapse ↑ ]
r/whatsthisrock is a Reddit community with 702,059 members. Dedicated to identifying mysterious rocks and minerals.
02 › How active is r/whatsthisrock? [ expand ↓ ] [ collapse ↑ ]
r/whatsthisrock has 702,059 subscribers and 7,865 posts in our index. It was created on 2013-01-28, 13 years ago.
03 › Which subreddits are similar to r/whatsthisrock? [ expand ↓ ] [ collapse ↑ ]
Other Education & Science communities of a similar size include r/learnjapanese (878,390 members), r/medicalschool (816,967 members), r/historicalcapsule (763,252 members), r/propagandaposters (741,998 members). Each is listed with its own subscriber and post counts in the related communities section above.