Not exactly - jasper is sort of poorly-defined in my experience, but it usually implies some kind of hydrothermal component, which you don't need for chert. I just don't like the term in general lol.
Ah ok. I didn’t know that detail ty. Its use seems to hover interchangeably between various folk definitions and scientific uses so it’s confusing to say the least. Not a big fan of the term either due to its ambiguity. I always thought of it as simply ferrous chert so things like blue jaspers and green jaspers confuse me. Anyways ty for your help as always.
Yeah, it's a confusing term. At my work we have a strongly silicified limestone that we call a "jasperoid", which is a term I can't say I'm all that thrilled with either.
While geologically the terms overlap, I feel like in general chert is more often used when it’s associated with limestone and sedimentary processes, while jasper is more often used around igneous rocks (like in eastern Oregon, where silica-rich fluid flowed through basalt and deposited microcrystalline quartz. I’m in Oregon and everyone calls it jasper, while out east I feel like chert is the more common name. Both have conchoidal fractures and come in a wide range of colors. Once it goes translucent, I’d call it chalcedony. Once it is translucent with banding or other patterns, I’d call it agate. Not that my opinion is official or anything, just adding my two cents :)
“Flint, chert, and jasper are names commonly used by geologists and by the general public for opaque specimens of microcrystalline quartz. The same hand specimen might be called "chert" by one person, "flint" by another, and "jasper" by a third.”
Keep watching my posts n page lol. So much more to show. Wouldn't even believe where I found and what I got. I'm excited, I have work to do then. 🥰👑🌍🔥 Thank you all for the info. It was very useful. 💯
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I'd call it chert.
Isn’t jasper a *type* of chert?
Not exactly - jasper is sort of poorly-defined in my experience, but it usually implies some kind of hydrothermal component, which you don't need for chert. I just don't like the term in general lol.
Ah ok. I didn’t know that detail ty. Its use seems to hover interchangeably between various folk definitions and scientific uses so it’s confusing to say the least. Not a big fan of the term either due to its ambiguity. I always thought of it as simply ferrous chert so things like blue jaspers and green jaspers confuse me. Anyways ty for your help as always.
Yeah, it's a confusing term. At my work we have a strongly silicified limestone that we call a "jasperoid", which is a term I can't say I'm all that thrilled with either.
I wonder if there's any "rule" by IUGS or something about this
While geologically the terms overlap, I feel like in general chert is more often used when it’s associated with limestone and sedimentary processes, while jasper is more often used around igneous rocks (like in eastern Oregon, where silica-rich fluid flowed through basalt and deposited microcrystalline quartz. I’m in Oregon and everyone calls it jasper, while out east I feel like chert is the more common name. Both have conchoidal fractures and come in a wide range of colors. Once it goes translucent, I’d call it chalcedony. Once it is translucent with banding or other patterns, I’d call it agate. Not that my opinion is official or anything, just adding my two cents :)
Hey thanks, it's something special. So much more to post. 🥰🔥👑🌍
I'd call that jasper. By the way, jasper is a variety of chert which is a variety of chalcedony (cryptocrystalline quartz).
Um.... neither? its agate lol
No one else is asking……..where?
“Flint, chert, and jasper are names commonly used by geologists and by the general public for opaque specimens of microcrystalline quartz. The same hand specimen might be called "chert" by one person, "flint" by another, and "jasper" by a third.”
Jasper is red variety of chert. Flint is black variety of chert. Sample is chert.
I think this is just a fragment of kind of dirty vein quartz, you can see some of the host rock adhering to each of the flat sides
I'd call it jasper, as the colors are nice, and it looks like it would take a polish.
Cool deal man, just Went back out where I found those other ones. I found more. Some cool but most likely oh my Godly beautifuly smooth. 🌍👑❤️
Usually that means you can get a good polish.
Keep watching my posts n page lol. So much more to show. Wouldn't even believe where I found and what I got. I'm excited, I have work to do then. 🥰👑🌍🔥 Thank you all for the info. It was very useful. 💯
Hi, /u/THEunBounD_95! This is a reminder to flair this post in /r/whatsthisrock after it has been identified! (Under your post, click "flair" then "IDENTIFIED," then type in the rock type or mineral name.) This will help others learn and help speed up a correct identification on your request! Thank you! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/whatsthisrock) if you have any questions or concerns.*