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Post by knave on Mar 4, 2020 14:34:27 GMT -5
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Post by parfive on Mar 4, 2020 14:38:18 GMT -5
So I guess the moral of the story is phones suck for spelling and looking at charts. Just as well I don’t have one. : )
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Post by knave on Mar 4, 2020 14:40:50 GMT -5
If the graph leads you to believe that coarse grinding removes material faster, what is misleading about that?
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Post by joshuamcduffie on Mar 4, 2020 14:48:15 GMT -5
Since Ben didn't ask, I will. Why? The axis is shifted up. It’s a valid way to present this data, but when you just glance at it (eg, on mobile when the image is too small to clearly see labels), it seems like a more significant loss in the coarse grit. Well, since virtually ALL the loss is in the coarse grit... The other grits are just to smooth and eventually polish the scratches left by the coarse as it removes the material.
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Benathema
has rocks in the head
God chased me down and made sure I knew He was real June 20, 2022. I've been on a Divine Mission.
Member since November 2019
Posts: 703
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Post by Benathema on Mar 4, 2020 15:52:16 GMT -5
I figured it was the y-axis scale not starting at zero. I zoomed in to where the data was interesting. Also shows the difference in slope between changing grits.
All the same that's a ~25% mass loss off the initial rock, overwhelmingly from coarse. So if there was any doubt about which stage does the most material removal, there ya go. Numbers to go with what folks have said/experienced.
Icanhazpopcorn?
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Post by knave on Mar 4, 2020 16:52:20 GMT -5
Help yourself it’s a good buttery batch.
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Wooferhound
Cave Dweller
Lortone QT66 and 3A
Member since December 2016
Posts: 1,423
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Post by Wooferhound on Mar 4, 2020 18:23:48 GMT -5
Well, in that case . . . It’s easy enough to fix. All it takes is a little willpower and a tap of the edit button. : ) Bold of you to assume I have any willpower... There was a time (10 years ago) when any and all grammatical, syntax, or spelling errors online would irritate me. Now I honestly don't care that much (find it a bit pedantic honestly). My philosophy now is if you can get your idea across to the "average" human (eg, through context clues), you're fine. Plus , Not everybody speaks English, so how could I possibly care about the Grammar and Spelling ?
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reynedrop
starting to spend too much on rocks
Member since February 2020
Posts: 204
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Post by reynedrop on Mar 4, 2020 18:58:45 GMT -5
I figured it was the y-axis scale not starting at zero. I zoomed in to where the data was interesting. Also shows the difference in slope between changing grits. All the same that's a ~25% mass loss off the initial rock, overwhelmingly from coarse. So if there was any doubt about which stage does the most material removal, there ya go. Numbers to go with what folks have said/experienced. Icanhazpopcorn? Yes that is why I said initially deceptive and not just deceptive. When you first look at it, it looks like much more than 25% was lost in coarse. Then you read the axis and realize it’s just cropped. 🤷🏻♀️ Again, not a critique; it’s still a perfectly valid way of graphing.
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gatorflash1
spending too much on rocks
Active in Delaware Mineralogical Society, Cabchon Grinding and Polishing, 2 Thumlers B's and a UV-18
Member since October 2018
Posts: 375
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Post by gatorflash1 on Mar 6, 2020 10:06:46 GMT -5
As some of you may know, I'm still working on my first ever full tumbling process. I threw a bunch of rocks in a 1# tumbler when I first bought it, destroyed some fluorite, and have all of those rocks sitting in a plastic cup (very high tech) while I tumble some other things. Last Saturday, I started a new tumble with peach moonstone, "rainbow" moonstone, pink opal, and labradorite in the 1#, and yesterday, my new tumbler (33B) came so I set that up and started another tumble with jaspers. I read online that a good "rule of thumb" is 7 days tumbling in your first course grit for rocks with Mohs hardness of 7, and then subtract 1.5 days for each 1 Mohs scale, so Mohs 6 = 5.5 days, Mohs 5 = 4 days, etc. So, tonight marks 5.5 days, so I went to check on my rocks, clean the barrel out, etc. Anyway, I put them all back into the tumbler with more of the same coarse grit (I have no idea what the rating/particulate size is; I cannot find it online at all). Partly I did this because I was too tired to clean the barrel out well enough to switch grits. Partly this is because I didn't know how to tell when they were "ready" and assumed that it was better to tumble that first stage longer if unsure. Didn't take pictures also because too tired to remember. Actually, I was so tired I forgot that this was the 1# barrel for a bit (I was confused where my beautiful almost magenta like piece of mookaite was... and why none of my pieces looked like jaspers at all). My understanding currently of the course grit step is to grind the rocks down into a smooth shape with no (or only intended) crevices in the surface, as those imperfections won't buff out in the polish stage. My edges were very smooth but there were a couple pieces that had some "jutting" if that makes sense, and I wasn't sure if it should be entirely smooth by the end of step 1. I currently plan on letting this run until Saturday or Sunday, then opening it up and just pulling the rocks out to examine. I want to know what to look for in pieces that can "move ahead" to medium grit. What do you specifically look for? What prompts you to throw a rock back in the coarse grit? I suggest you get this good how to tumble book. it will answer all your questions. rocktumbler.com/book.shtml
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
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Post by whyofquartz on Mar 11, 2020 15:59:04 GMT -5
Continue to ask questions, but knowledge will come with experience. Remember, it is not, rocket science. There are many different ways to accomplish the same thing. And lastly, do the rocks to your satisfaction. They are ready to move on when they make you happy. I appreciate that, what I am feigning vexation over is that seeing the oiled-glass sheen some have achieved has made me rethink what "done in stage 1" means just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order
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reynedrop
starting to spend too much on rocks
Member since February 2020
Posts: 204
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Post by reynedrop on Mar 12, 2020 19:52:53 GMT -5
I appreciate that, what I am feigning vexation over is that seeing the oiled-glass sheen some have achieved has made me rethink what "done in stage 1" means just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order Context: that’s 21.5 hours of one person’s work paid at minimum wage. 6 hours and 18 cents of a local trucker’s time. All of that not considering taxes.
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Post by hummingbirdstones on Mar 12, 2020 20:45:34 GMT -5
I appreciate that, what I am feigning vexation over is that seeing the oiled-glass sheen some have achieved has made me rethink what "done in stage 1" means just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order Did you order from Kingsley North? They have never been able to get their shipping prices correct on their website. You need to call them to place an order and they will work with you on how you want it shipped (Priority, etc.) and charge you the correct price.
I have no idea why they haven't had someone fix that on their website, but it's been like that forever.
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Post by aDave on Mar 12, 2020 21:05:36 GMT -5
just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order Did you order from Kingsley North? They have never been able to get their shipping prices correct on their website. You need to call them to place an order and they will work with you on how you want it shipped (Priority, etc.) and charge you the correct price.
I have no idea why they haven't had someone fix that on their website, but it's been like that forever.
whyofquartz, this is true. Call them and ask about shipping a LFRB to you of coarse grit. You'll get about 45 pounds or so for a flat rate box price. In addition, I'd ask them (if you go this route) to reinforce the box with additional packing tape. I ordered a LFRB from them which broke open. USPS held it for a haz mat review. If I ever order again from them, I'd do my best to insure that the box was reinforced as best as can be.
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
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Post by whyofquartz on Mar 13, 2020 8:18:42 GMT -5
just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order Did you order from Kingsley North? They have never been able to get their shipping prices correct on their website. You need to call them to place an order and they will work with you on how you want it shipped (Priority, etc.) and charge you the correct price.
I have no idea why they haven't had someone fix that on their website, but it's been like that forever.
yes i ordered from Kingsley North, I did think $14 was a bit steep for shipping but it is 5lbs and it would take 2 flat rate boxes to ship 4lbs and that is more or less $15.
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
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Post by whyofquartz on Mar 13, 2020 8:27:18 GMT -5
just ordered up some course grit, it is good to know if i wanted my 5lbs of SiC to get from Michigan to me overnight i could do that for a mere $156 shipping on my $11 order Context: that’s 21.5 hours of one person’s work paid at minimum wage. 6 hours and 18 cents of a local trucker’s time. All of that not considering taxes. I don't doubt it is worth every penny, we are talking about getting a box from southern Canada to northern Mexico in less than a day, no mean feat. I was just trying to imagine a scenario where someone would need five pounds of silicon carbide THAT badly. if I was ordering a pallet of goods, I might be a relatively insignificant thing to pay for for "El Rapido"
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reynedrop
starting to spend too much on rocks
Member since February 2020
Posts: 204
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Post by reynedrop on Mar 13, 2020 8:31:36 GMT -5
Context: that’s 21.5 hours of one person’s work paid at minimum wage. 6 hours and 18 cents of a local trucker’s time. All of that not considering taxes. I don't doubt it is worth every penny, we are talking about getting a box from southern Canada to northern Mexico in less than a day, no mean feat. I was just trying to imagine a scenario where someone would need five pounds of silicon carbide THAT badly. if I was ordering a pallet of goods, I might be a relatively insignificant thing to pay for for "El Rapido" I was mostly bringing it up to show how much people might have to work to pay for overnight shipping. It might make sense if there were only a handful of packages being shipped overnight through the same service taking the same route (ish). But I would be more inclined to believe there are many packages that get shipped overnight. Not like, 1000, but through the same courier service in one decent sized town, at least 10-20.
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whyofquartz
spending too much on rocks
So, Africa is smaller than I expected...
Member since December 2019
Posts: 316
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Post by whyofquartz on Mar 13, 2020 8:43:13 GMT -5
Did you order from Kingsley North? They have never been able to get their shipping prices correct on their website. You need to call them to place an order and they will work with you on how you want it shipped (Priority, etc.) and charge you the correct price.
I have no idea why they haven't had someone fix that on their website, but it's been like that forever.
whyofquartz , this is true. Call them and ask about shipping a LFRB to you of coarse grit. You'll get about 45 pounds or so for a flat rate box price. In addition, I'd ask them (if you go this route) to reinforce the box with additional packing tape. I ordered a LFRB from them which broke open. USPS held it for a haz mat review. If I ever order again from them, I'd do my best to insure that the box was reinforced as best as can be. that would definitely be a sound use of $100~ especially since 45# of 5# is $99+tax for grit and then $68.85 freight. But i only had $25 to spend. first hundo i make selling rocks though...
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boucaneer
off to a rocking start
Member since May 2020
Posts: 16
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Post by boucaneer on Jun 24, 2020 17:35:34 GMT -5
I recommend this book which will save you a lot of time learning how to tumble. I gave a copy to all my grandchildren when I gave them a tumbler to begin the hobby. They have turned out some beautiful results. rocktumbler.com/book.shtmlI would like to buy this book but they do not ship to England. Any American pals willing to lend a hand please? 👍
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Post by rockpickerforever on Jun 24, 2020 18:59:11 GMT -5
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boucaneer
off to a rocking start
Member since May 2020
Posts: 16
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Post by boucaneer on Jun 25, 2020 2:33:24 GMT -5
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