Has This Rock Been Worked Or Is It Natural?

[diggummup]

What do you think?

 

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[Eu_citzen]

I'm thinking natural.

 

[Kray Gelder]

As rocks go, it's pretty cool. Natural tumbled stone, IMHO.

 

[diggummup]

It's not tumbled. Here are a few close ups.



It was in a box of Pre-Columbian artifacts that I purchased.

 

[kingskid1611]

Natural or worked that is one cool piece.....

 

[diggummup]

Natural or worked that is one cool piece.....

That's what I thought. This jade head was in there too, label says Eagle Knight Mixteca 1300 a.d.-1500 a.d. Mitla Valley.

 

[Kray Gelder]

It's not tumbled. Here are a few close ups.

View attachment 1607224View attachment 1607225View attachment 1607226

It was in a box of Pre-Columbian artifacts that I purchased.


View attachment 1607228

Well Gosh, Diggumup. Guess I failed the day's quiz. Ya got me.

 

[Rookster]

Very cool stone. Never seen anything close to those markings.

 

[diggummup]

Well Gosh, Diggumup. Guess I failed the day's quiz. Ya got me.

No not really. I'm not trying to fool anyone. I just didn't want anyone to form an opinion based on the box of relics that came with it. I still can't figure the thing out. All the pieces have labels but the labels are all in a pile together. So sorting them out is a job. Some of them only have the area they were found in though.

 

[diggummup]

A few more pics...

 

[DDancer]

I'm more inclined to think its a natural concretion just from the structure and not man made. The stone would be more homogeneous if it were formed in my opinion.

 

[hvacker]

I thought of a grinding stone like how a mill stone works.. This is not my end though. The groves just seem intentional.
Are the black areas a deposit or the color like desert varnish?
Cool stuff

 

[Eu_citzen]

I thought of a grinding stone like how a mill stone works.. This is not my end though. The groves just seem intentional.
Are the black areas a deposit or the color like desert varnish?
Cool stuff

I'm thinking its a sedimentary rock, the "grooves" are layers which are softer then those that formed the "bumps".

 

[diggummup]

I thought of a grinding stone like how a mill stone works.. This is not my end though. The groves just seem intentional.
Are the black areas a deposit or the color like desert varnish?
Cool stuff

they are like desert varnish it looks like. I had to look that term up.