Please help identify this cool piece

[bookiebryant]

Found this on a beach while on vacation in Oahu Hawaii last week. Just curious if any one knows what it could be?

 

[EricTheCat]

That's a cool piece. It resembles agate to me. The color is spectacular for a natural stone. I know very little about Hawaiian geology so just my 2c, it will be interesting to hear what others have to say.

Thanks for sharing.

 

[Rasputin]

I think it is a piece of slag glass. If it is agate, it is dyed, as agate does not naturally occur in blue.

 

[bammer]

Looks like a small dyed geode. Probably from Mexico... a long way from home. Are there any tourist 'gem mining' places in the area? Sometimes companies buy a variety of stones and place them in dirt and let the tourists sift them in flume type arrangement.

 

[bookiebryant]

This was found on the beach in front of our beach house on the north shore. We went looking for sea glass on the beach when I found it. This piece does not look like any other glass that I found. If it is slag glass would it crystallize in the center as in the first picture? I assumed it to be a small geode myself but not sure. The research I've done on the islands as far as minerals or gems lava rock, black coral. Also there is no mines as far as I know on the island. But who knows could have traveled many miles away from its home in the Pacific.

 

[Red James Cash]

Blue geodes contain titanium and occur naturally.

 

[BurntBear]

Appears to be a dyed Agate/Geode for sure. Chalcedony (Agate) does occur in blue but they usually aren't that saturated by any means. Some of the most exceptional blue Chalcedony varieties are from the Pacific Northwest and Kenya has amazing specimens as well.

 

[Rasputin]

Of course, I stand corrected. There is blue lace agate, but nothing as dark as this piece.

 

[Rasputin]

Can you get a closeup of the vug for us?

 

[bookiebryant]

This picture is taken through a loop and cropped as best as i could. Hope this id good enough.

 

[yakker]

Isn't that crazy? Nice close-up, BTW.

 

[bammer]

If you do a google image search for 'dyed blue geode'. You will find out what we are talking about.
I think the Blue is just a bit too much Blue for a natural stone.
I like posts like this, you always learn something and sometimes can help other as well.

 

[DDancer]

Its and agate/small geode. Natural not dyed. Yes blue agate does occur I have a 10lb chunk that proves it and yes I've been accused of dying it but the slabs say different. Though its not very common such agates do occasionally form in the magma from volcanic events when there is a fair amount of mineralized water mixed in. If it was a tourist piece it'd not look like that at all. Dyed agates with that much internal fracturing would display the dye thru the cracks around the individual crystals.
Looks to be a second mineral inside, or sand grains, but they seem to have structure similar to a zeolite and if so this also lends to volcanic origin.
My thoughts.

 

[bookiebryant]

Thank You all for the input and yes that is a piece of sand grain inside as well. IF I can find any other info ill be sure to let yall know.

 

[DDancer]

Almost forgot this picture. The blue agate second top left was given to me by a geologist and is from a lava event though I don't remember where. Been 30 or so years since we spoke then... one of a few individuals who helped spark me in my childhood.

 

[Eu_citzen]

I can only agree, agate.