Any geologists in the house?

[PeterB]

What type of stone is this?:

1st pic
2nd pic

Edit: BW warning, sorry for the ultra-huge images, still learning imgur.

[space-time]

Pyramid

[SDGuy]

space-time wrote:
Pyramid

:agree:

[dad@home]

I'm no geologist but it looks a lot like jasper.

http://en.wikipedia.org/wiki/Jasper

I have a belt buckle with a nice example in the middle that came from the Owyhee Mountains in southern Idaho.


John

[Speedy]

SDGuy wrote:
[quote=space-time]
Pyramid

:agree:
Yes. Not an uncommon mineral. Some very large examples can be found in Egypt.

[PeterB]

dad@home wrote:
I'm no geologist but it looks a lot like jasper.

http://en.wikipedia.org/wiki/Jasper

I have a belt buckle with a nice example in the middle that came from the Owyhee Mountains in southern Idaho.


John

I thought it might be jasper too, just hadn't seen anything that looked exactly like this. It's too bad for the chip at the top.

[Stephanie]

Look on ebay for jasper pyramid - there was one example that looked similar to yours.

[freeradical]

I think it's used to make bowling balls.

[Speedy]

freeradical wrote:
I think it's used to make bowling balls.

Our bowling alleys use round balks. I suppose a pyramidal shaped bowling ball would work on a well waxed alley.

[sekker]

Speedy wrote:
[quote=SDGuy]
[quote=space-time]
Pyramid

:agree:
Yes. Not an uncommon mineral. Some very large examples can be found in Egypt.
A large number of human-made ones can be found on Wall St USA.