I got this from a seller I've done a good bit of business with who has a lot of old stock pieces, whether jasper, agate, glass, or otherwise. He doesn't know anything about the origins of this piece and classified it as slag glass. I don't need an ID since it's (believed to be) slag glass and I'm hoping this is acceptable to post here. I know a little bit about slag glass but it's just the bare basics. I've read that it can be formed in nature but is mainly from smelting, but I've also seen articles say it can't form naturally. Either way I'm clueless. It will be coming in the mail short ..read more

Found in a tunnel in the Faroe Islands. I’m not a geologist so I have no idea how common this is. Has anyone seen this before? submitted by /u/Lanky-Tomorrow352 [visit reddit] [comments ..read more

I just got a summer job working for geological survey of my state, bedrock mapping, gis, geochem, etc, i’m doing it all. But I think whoever hired me thinks I know more than I do ? submitted by /u/Whole_Air1486 [visit reddit] [comments ..read more

I found this piece off what I assume is granite but looks really odd. If anyone can shed some light for on this rock I really would appreciate it. Thanks. submitted by /u/aretheesepants75 [visit reddit] [comments ..read more

submitted by /u/Mental-Vacation-84 [visit reddit] [comments ..read more

Is there any connection between mineral fluorescence and animal behavior? I started thinking about this when in class we talked about a snail that if found where the bedrock is limestone. I realize a lot of animals can see fluorescence, and the bedrock is important to what minerals are available to the ecosystem. There’s an area near where I live where there is an eroded calcite vein (so just chunks of it are on the surface) that is green under shortwave UV. Could that tell an animal that there is potentially food because of an organism that uses calcite? I’m terrible at explaining my questio ..read more

submitted by /u/RHSpedden [visit reddit] [comments ..read more

I found a couple of stones (#1) that have a weird veins texture. Just wanted to know if this is natural or man made and what it is called. #2 looks like it's melted, also i would appreciate an explanation. Thank you all. submitted by /u/C6rbon-based [visit reddit] [comments ..read more

submitted by /u/newsweek [visit reddit] [comments ..read more

submitted by /u/WestonWestmoreland [visit reddit] [comments ..read more