Mark K
Cave Dweller
Member since April 2012
Posts: 2,818
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Post by Mark K on Sept 14, 2024 15:36:43 GMT -5
My first thought is that it looks like Globe Onyx.
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chaosdsm
starting to spend too much on rocks
Member since April 2024
Posts: 162
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Post by chaosdsm on Sept 14, 2024 16:59:29 GMT -5
I didn't realize just how early in the day it still was.... so I finished hand sanding this rock, 3000, 5000, 7000, and finally 10,000 grit SiC wet sanding. Wet sanding was on a 3/8" thick engineered flat glass lapping plate with running water during the whole sanding process. I have not used any kind of polish on this, this is just the result of wet sanding with SiC sandpaper after using the diamond sharpening stones. Looking at it face on, I can easily see the gloss though I'm not able to catch it with the camera. This angle shows it nicely though: NOTE: the image is flipped so you can easily read the quarter in the rock!!!
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Post by jasoninsd on Sept 14, 2024 21:31:17 GMT -5
chaosdsm - That one you did the hand sanding on came out FANTASTIC! Nice job on working that one by hand!! *Got my fingers crossed for Blinky!!
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chaosdsm
starting to spend too much on rocks
Member since April 2024
Posts: 162
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Post by chaosdsm on Sept 16, 2024 17:05:25 GMT -5
I think I overloaded my drum this last time... I checked on progress & there was no discernable difference from last time despite putting in 4oz of fresh 36 grit SiC. I took out all the ceramic & some of the smalls, lowered overall weight by 1.2 lbs, and used about 1/2 cup less water. Hope this round goes better!
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chaosdsm
starting to spend too much on rocks
Member since April 2024
Posts: 162
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Post by chaosdsm on Oct 28, 2024 19:29:38 GMT -5
Used 8 ounces of 36 grit for a little over 9lbs of rock. Been tumbling for just about 18 days, with a 7 hour break on day 9 to recharge batteries. Started it up just hours after Hurricane Milton had passed. After 18 days, even my 1/100" screen did not recover any grit. Also, in a 7 day tumble with 36 grit, the rocks would normally have a distinctly rough feel from the grit, but after 18 days, the rocks feel like they've been through 220 grit, and a 30 second burnishing against my jeans shows a bit of a shine. Part of the reason for the long tumble was hurricane cleanup. Nothing major, but a 10sq ft section of metal roof pealed back over my rock tumbling office... about 15 feet away from my tumblers, so no damage to them, but it left a lot of debris in the office that has to be removed. I still haven't done anything with the actual roof, but on my next day off I'm going to cut it off, remove the remainder up to the hip, and tarp over it. I'm going to have to repair the two damaged roof trusses before I can put new metal back up. Some significant reduction in weight occurred with the 18 day tumble. This rock on the left here as an example, which had started at 74 grams, then dropped to 66 grams is now just 48 grams. I decided to just run it through the tumbler instead of trying to flatten the one face as it was much more uneven than I initially thought. And Blinky has completely vanished. I cannot find anything that even partially resembles it... but he will live on in my avatar, at least for a while Hadn't really paid much attention to this one before, but look at all the directional variation in the layers. I think I'm going to try to grind the left side off before I put it back in for more tumbling. Here's the other side of it This one would have been pretty nice if it weren't for that big band of dirty cream colored rock in there Here's a top down view of it. Still some peaks & valleys there, but they're pretty shallow now. And a few more views of several rocks:
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