what is this 'mineral'?

[My Boy Boris]

i have a bunch of it but don't know what it is. thanks

 

[Larry (IL)]

It looks like pink agate (Quartz) to me.

From Google:

Quartz is a very common mineral in the Earth’s crust. Chemically, quartz is silica, or silicon dioxide, SiO2. It is found in most types of rocks: igneous, metamorphic and sedimentary. Quartz is rather hard, 7 on the Moh’s hardness scale, and has a glassy (vitreous) luster.

 

[Mineral Master]

It's an agate, and it looks like you have quite a specimen there.



Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. –Ronald Reagan

 

[My Boy Boris]

thanks. just came across it online. couldn't find it for the life of e but right after i post i find pics. it's called rhodochrosite.

 

[Mineral Master]

np

 

[Champ Ferguson]

It's an agate, and it looks like you have quite a specimen there.



Freedom is never more than one generation away from extinction. We didn't pass it to our children in the bloodstream. It must be fought for, protected, and handed on for them to do the same, or one day we will spend our sunset years telling our children and our children's children what it was once like in the United States where men were free. –Ronald Reagan

Absent any basic testing, I agree. And its a very pretty specimen.

 

[Dave J.]

It's a rhodochrosite speleothem.

https://en.wikipedia.org/wiki/Speleothem
http://geology.com/minerals/rhodochrosite.shtml

 

[Johnho]

Looks like rhodochrosite to me too. See if a knife will scratch it, in a very out of sight spot. Rhodochrosite should scratch. Quarts or agate won't.