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Zebra stone

Posted by SophiaJoy MB  
Zebra stone
August 09, 2012 05:20AM
A while ago I read that Zebra stone (brown and cream white) is found only in Australia. But I've just found a website that says it is also found in Brazil. Where can Zebra stone be found actually?
Re: Zebra stone
August 09, 2012 08:09AM
Zebra stone is simply a commercial name for a banded brown and white sedimentary rock found in the Kimberley region of Western Australia. It is colorful, relatively soft and takes a good polish so it became popular with lapidarists and stone cutters. The original source, found over 50 years ago, was covered by Lake Argyle after construction of the Ord River dam. I see it is still coming on the market so presumably they have found another source. I know nothing about the Brazilian material.

avatar Re: Zebra stone
August 09, 2012 12:00PM
There is no official organization that approves or disapproved names like the IMA does for minerals, names that are created to describe one variety of a mineral, rock type or lapidary material, are immediately used by others to describe similar kinds of materials, especially if it is felt that it will lend perceived value to what is being offered for sale.

Stephen, thanks for the "definition" of Zebra stone I have added it to mindat's glossary where It may in the future serve a more useful purpose than being burried in the message board posts.

Is someone comes forward with a description and locality for the Brazilian locality, Ill add that to our glossary on the same page.

Rock Currier
Crystals not pistols.

Edited 1 time(s). Last edit at 08/09/2012 12:02PM by Rock Currier.
Re: Zebra stone
August 09, 2012 12:06PM
hello zebra stone is a sedimentary rock which is a rather porous stone does not polish all item which are on the market have been treated with either clear paint or liquid glass
avatar Re: Zebra stone
August 09, 2012 12:28PM
Does the zebra stone from Australia need to be filled with something for it to take a good polish?

Rock Currier
Crystals not pistols.
Re: Zebra stone
August 09, 2012 01:46PM
Was in Beaver , Beaver County, Utah on the north exit on the east side of I 15. A new rock shop there and they had a beautiful black and white stone -Zebra stone ,they have a mine in the Milford area - Mr Penny But it is of high quality and they called it White Tiger . He said that you could go to the mine site for a few samples ( not truck loads ) Haven't been to it yet.
avatar Re: Zebra stone
August 09, 2012 02:05PM
There is brown and white and black and white zebra stone. The brown and white zebra stone comes from Australia as mentioned above. But there seems to be several sources for the black and white variety. I have seen some noted as Brazil (no precise locality) and some from Utah as also mentioned above. Somehow I recall seeing some from Africa, but that's pretty generic without even a country. There could be other sources. Since much of this stuff is used for lapidary and tumbling, they are not too concerned about noting locations.

As usual there are always fakes and such so you should be wary of anything that looks too uniform as it could be manufactured.

Re: Zebra stone
August 09, 2012 07:25PM
The original source was the Argyle Downs area, but there are 3 more locations; 1 on the Packsaddle Plains area, 1 on Newry Station in the Northern Territory and 1 on the old road to Argyle Downs.

The zebra stone is in the Ranford Formation and the one I know on the old road, is at the base of a mesa, 25 ft ( 7.5 m) high, sat on top of a 400 ft ( 120m ) scree slope covered in spinifex grass. (And a bl**dy difficult climb, too!)winking smiley

An in situ photo of a seam of zebra stone that I took last year. You can see where people have tried to extract the stone.

avatar Re: Zebra stone
August 09, 2012 08:02PM
Does anyone have any pictures of zebra stone with a good locality that they can upload to our data base? I think they would be useful, and I would be happy to include them in our glossary. It would make our glossary so much more effective and might be the ideal place to show what various varieties of agates and other lapidary materials look like. As an example see the entry on Herkimer Diamond in our glossary.

So many times lapidary materials fall between the cracks here on mindat and their accurate localities are quickly lost and forgotten. I have been hoping for a long time that a real agate nut would sign up here on mindat and make it his/her objective to find images and accurate localities for many of the different kinds of agate and other lapidary materials that could be uploaded to Mindat.

Rock Currier
Crystals not pistols.
avatar Re: Zebra stone
August 09, 2012 09:29PM
Robert - is this material also referred to as "print stone" or "newsprint jasper"? Or is that different material? Based on the photo I am curious as it looks a lot like material I have seen referenced as print stone.

thanks for any info,
stephanie smiling smiley
Re: Zebra stone
August 09, 2012 10:52PM
hello rock
to answer your question no filler needed the material cuts well sands well to a semi polish but does not take polish with ordinary means the polish compound gets trapped on the stone and can only removed with great difficulty gets stuck into the microscopic pores of the stone can possible polished with diamond compounds have not tried this so far so most people use clear paint or liquid glass to achieve a kind of polished item hope this answers some questions

avatar Re: Zebra stone
August 09, 2012 11:05PM
Found this SE of Payson, AZ. It is locally called zebra stone. What do you think?

avatar Re: Zebra stone
August 09, 2012 11:11PM
looks very much like a banded flint/chert.
avatar Re: Zebra stone
August 09, 2012 11:38PM
Yes, I agree with Jolyon, looks very much like banded flint. I guess there are *a lot* of things called zebra stone based on appearances. I just saw some "green zebra stone" listed on ebay, from India.
avatar Re: Zebra stone
August 09, 2012 11:54PM
avatar Re: Zebra stone
August 10, 2012 12:23AM
Thanks David, yes, based on those photos I have seen this type of stone also referred to as print stone.
avatar Re: Zebra stone
August 10, 2012 08:17AM
The trouble with this and similar terms is that it is an informal rock name, it does not really fit under quartz, maybe It would fit in Gemdat or Rockdat?

avatar Re: Zebra stone
August 10, 2012 11:27AM
Dave, that is a good reference. I have included it in our glossary reference for Zebra stone.

Rock Currier
Crystals not pistols.
avatar Re: Zebra stone
August 10, 2012 11:29AM
This is a good picture. It should be uploaded to the mindat gallery so it won't get buried in the old Message Board posts and then I could use it in the glossary listing.

Rock Currier
Crystals not pistols.
avatar Re: Zebra stone
August 10, 2012 11:32AM
If we can confirm good localities of various zebra stones and get pictures of them uploaded to Mindats image database and hopefully some sort of print reference we can include them all in our glossary entry for Zebra stone.

Rock Currier
Crystals not pistols.

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