ebechan
off to a rocking start
Member since August 2004
Posts: 23
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Post by ebechan on Aug 3, 2004 2:11:00 GMT -5
I have a bunch of ocean rocks I picked up from Kaikoura in New Zealand while Visiting in Jan. If you go to the link below, you can get an idea of what most of the stones on the beach look like. And if you look really close, you will see one white stone (right side of middlish). www.ndavies.com/da/photos/album/newzealand/DSCN1390.htmlI picked out a lot of these white stones while there, not so easy as there seemed to be about 1 white stone for every million dark grey ones. Not sure what they are. limestone is my guess. They are uniforily white and incrediblely smooth. The dark grey stones might be from the volcanic activity that formed the islands. The dark grey stones, while equally as worn, are not as smooth as the white ones. And I found a couple rocks that are sharply layered in 4mm bands of black and white. so, my questions are, 1. What do you think these stones are, exactly? And, I wanna tumble them. to see what happens, so 2. should I not tumble the balck ones with the white ones, as they might be different hardness? 3. since they are already shapped and smooth, can I go directly to prepolish? Where do you recomend i start? Thanks for any help.
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deepsouth
fully equipped rock polisher
He who rocks last rocks best
Member since January 2004
Posts: 1,256
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Post by deepsouth on Aug 3, 2004 2:42:57 GMT -5
HI Ebechan, I have several of them whites stones myself. They are limestone and I believe too soft to tumble. You sure had a great trip , going by the fotos you made . But you have not been quite to the bottom part . Milford sound seems to be the furthest you have been. I am pleased you enjoyed your trip. Come again
Jack
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Post by BearCreekLapidary on Aug 3, 2004 10:14:42 GMT -5
Hello,
I am not of much help with your question. I just wanted to say "welcome". There is a wealth of information within this group, so don't be afraid to ask questions.
Enjoy,
John
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Banjocreek
fully equipped rock polisher
Member since March 2003
Posts: 1,115
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Post by Banjocreek on Aug 3, 2004 13:10:17 GMT -5
Yeah, I wanna say "Welcome", and I think the photos are great. #1. I don't have a clue. #2. Probably not, try the scratch test. #3. If they have the shape you want, I take beach rock straight to 120/220, or at best a short trip thought the 60/90. That is about as good as I can do. I don't adhere to a lot of 'Hard and Fast' rules in my tumbling. I'll try anything once. I have at times tried the same thing twice, and hoped for different results, which would classify me as a moron. But I'm happy. ;D
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deepsouth
fully equipped rock polisher
He who rocks last rocks best
Member since January 2004
Posts: 1,256
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Post by deepsouth on Aug 3, 2004 16:39:33 GMT -5
Great to have you on board Ebechan,
I was a bit tired last night , but I wanted to answer your question about the very smooth limestone you picked up at Kaikoura. I also had a look through all the fotos you placed on the net and they are just great !! especialy the ones taken from the top at Queenstown. I will be looking for some fine weather to go to the top myself next time I go there, or even make a special trip for it. Queenstown is about 180 km ( 112,5 miles) for me and the scenery is just awesome all the way.
Jack
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Post by connrock on Aug 3, 2004 17:21:35 GMT -5
H ebchan and welcome to our group,,,,,, Well Jack told you what the rocks are and the rest banjo took care of. The only suggestion I have is to maybe try chrome oxide for a polish.I "think" it's good for soft material. You can ask James about the polish as he has just used it and got some very impresive results. I hope you enjoy the group 1/2 as much as I do,,,, Tom
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