Is this agate?

[Chengjing]

Found this in a charity shop selling as a paper weight. Is it an agate? Thanks

 

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[fuss]

Could be Onyx, same material as agate just different banding structure, I've seen a lot of onyx carved items recently including this....

 

[Chengjing]

Thanks, must be it!

 

[stdenis_jd]

Could be Onyx, same material as agate just different banding structure, I've seen a lot of onyx carved items recently including this....

View attachment 1715911

bingo

 

[IAMZIM]

Question: Is it egg shaped? I am thinking it is not a paper weight, I think it is a sock darning egg.

 

[smokeythecat]

It is onyx. A variety of calcite. Agate is much harder, and is a quartz mineral. Eggs are made as a "just for fun" kind of carving. My mom had a collection of various stone eggs I still have.

 

[Chengjing]

yes, it is egg shaped