Results 391 to 400 of 804
Thread: I Found It Over There
-
07-03-2014, 11:01 PM #391
-
07-03-2014, 11:05 PM #392
Quartz, as Silicon Oxide, is what novaculite is made of, and the abrasives that most natural stones contain, are the harder silicate minerals.
There is a distinction between quartz crystals, from what I remember from reading a scientific journal some years ago. It takes the forms or microcrystalline, cryptocrystalline and some others I can't remember right now. One of those should completely be avoided in sharpening stones, and what I have in mind are the lines and dots that look like ice and can be found in some geologic formations.
So, for us rockhounds, silicon oxide is our best friend, but can also be our worst enemy.
-
07-03-2014, 11:25 PM #393
-
07-03-2014, 11:32 PM #394
- Join Date
- Feb 2013
- Location
- Haida Gwaii, British Columbia, Canada
- Posts
- 14,436
Thanked: 4827I am no geologist. From what I have seen, micro quartz is the super fine little sparkles and white dots found under magnification in hones. Where it get to be enough for lines and inclusions is where it gets to be toxic for the edge. The best example of this that I can think of is the Pierre La Lune special stone for good razors only. It has a millions super tiny sparkles. It is also so aggressive in it's cutting speed that it can over hone a razor quite easily. That is my take on quartz. Also many very good hones are from near quartz seams, but never in the quartz seam.
It's not what you know, it's who you take fishing!
-
07-04-2014, 12:03 AM #395
-
07-04-2014, 06:14 AM #396
There are many minerals that can look like that. You can't assume it's quartz at all. You have to know the rock and it's associations which will then point you in the right direction as to what it might be.
No matter how many men you kill you can't kill your successor-Emperor Nero
-
07-05-2014, 01:55 AM #397
Well what ever the grit of this rock I really enjoy using it to grind the rusty layer of steel off a old axe head.
Not a task for any manmade course stones. It's takes a lot of strength just to simply move the thing.
-
07-05-2014, 05:50 AM #398
Get yourself a chunk of Magnetite Fe3O4 and use that for an old axe and watch the sparks fly when you use it (literally).
No matter how many men you kill you can't kill your successor-Emperor Nero
-
07-05-2014, 06:08 AM #399
- Join Date
- Feb 2013
- Location
- Haida Gwaii, British Columbia, Canada
- Posts
- 14,436
Thanked: 4827I find it a little amusing that you seem to be the only one with any formal education and experience in geology, and never really seem to do any rockhounding.
It's not what you know, it's who you take fishing!
-
07-05-2014, 01:28 PM #400