🔎 UNIDENTIFIED PLEASE NEED HELP CANT FIGURE OUT!!!!!

Alwayslooking2 · Apr 8, 2023

This rock is blue and different colors. It's not magnetic. So NO it's not iron . Please if you can help I would be appreciative. FOUND IN SOUTHEAST MISSOURI. THANK YOU.

Gulf Coast Pirate · Apr 8, 2023

Azul bahia granite?

antmike915 · Apr 9, 2023

Wish I could help but I bet that would look awesome polished.

blauer · Apr 10, 2023

Alwayslooking2 said:
This rock is blue and different colors. It's not magnetic. So NO it's not iron . Please if you can help I would be appreciative. FOUND IN SOUTHEAST MISSOURI. THANK YOU.View attachment 2078045

I'm thinking it is Blue Chert but more information is needed.

Where did you find it (more specific than SE)?

What is the estimated hardness of the specimen, i.e. What can scratch it (fingernail, iron nail, quartz, etc... in increasing hardness)?

What color streak does it make on white and/or black porcelain?

Apparently, a place called Bee Bluff is famous for it's blue and gemmy Chert. Check it out.

Blackfoot58 · Apr 10, 2023

That is a fantastic find IMO. Are you going to be able to go back and look for more?

Clay Diggins · Apr 10, 2023

blauer said:
What is the estimated hardness of the specimen, i.e. What can scratch it (fingernail, iron nail, quartz, etc... in increasing hardness)?

What color streak does it make on white and/or black porcelain?

That won't help. Streak, hardness and specific gravity tests only work on minerals. Those tests will not identify a rock. Clearly, from the appearance this is a rock - not a mineral. Those tests won't reveal what kind of rock you have. If you want to know what the rock is you will need to study the geology, mineralogy and stratigraphy of the immediate area it was found. In other words we need more information to tell you what kind of rock it is.

It is a pretty rock. It might look nice tumbled. It could be chert or one of the many other colors of chalcedony. It could also be colored blue by the lead content. That area of Missouri is well known for it's lead deposits. It doesn't appear to be blue due to a Tyndall effect so it's probably just another colored chalcedony. There may be a local name for this blue rock. Since we don't know the geological locality all we really have is "blue" and "rock" and a picture.

Blackfoot58 · Apr 10, 2023

Even if it is chalcedony, it is a fantastic color. Congratulations whatever it turns out to be.

uglymailman · Apr 10, 2023

Ther is a thread here "Got a rock you want identified?" There are several helpful people there. Also, include measurement or something next to it for scale. Good luck.

blauer · Apr 11, 2023

Clay Diggins said:
That won't help. Streak, hardness and specific gravity tests only work on minerals. Those tests will not identify a rock. Clearly, from the appearance this is a rock - not a mineral. Those tests won't reveal what kind of rock you have. If you want to know what the rock is you will need to study the geology, mineralogy and stratigraphy of the immediate area it was found. In other words we need more information to tell you what kind of rock it is.

It is a pretty rock. It might look nice tumbled. It could be chert or one of the many other colors of chalcedony. It could also be colored blue by the lead content. That area of Missouri is well known for it's lead deposits. It doesn't appear to be blue due to a Tyndall effect so it's probably just another colored chalcedony. There may be a local name for this blue rock. Since we don't know the geological locality all we really have is "blue" and "rock" and a picture.

Still, good as a starting point and for more information.