You are viewing a single comment's thread from:RE: Part #13 [mystery of geology] rocks and minerals..... ???View the full contextgeopolis (54)in #steemstem • 7 years ago Your post has been personally reviewed and was considered to be a well written article. You received a 80.0% upvote since you are a member of geopolis and wrote in the category of "geology". To read more about us and what we do, click here. https://steemit.com/geopolis/@geopolis/geopolis-the-community-for-global-sciences-update-4