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Lapis Nevada sphere

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Author Topic: Lapis Nevada sphere  (Read 1663 times)
Sandsave
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« Reply #15 on: March 24, 2016, 06:01:23 pm »

Wow! That is beautiful. so it's glass? I need a couple friends like that!
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bobby1
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« Reply #16 on: March 24, 2016, 08:59:05 pm »

It's not glass. It is solid quartz but not crystalline quartz. It is made from a large ingot of fused quartz. This material is chemically identical to natural quartz and is made from the quartz components of sand. The material is made into a huge (8 feet across) cylindrical ingot that is sliced in 34" high segments that are sliced into quarters. These pie shaped pieces are used to make very large crucibles for melting pure silicon that gets drawn into boules up to 12" or more in diameter. These  boules are sliced into thin wafers upon which electronic circuits are developed for the electronics industry. This sphere was made by Richardson's Ranch about 20 years ago at a cost of about $7,000. Today it would cost about $50,000 to duplicate it.
Bob
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Kaljaia
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« Reply #17 on: March 24, 2016, 10:15:40 pm »

It's not glass. It is solid quartz but not crystalline quartz. It is made from a large ingot of fused quartz. This material is chemically identical to natural quartz and is made from the quartz components of sand. The material is made into a huge (8 feet across) cylindrical ingot that is sliced in 34" high segments that are sliced into quarters. These pie shaped pieces are used to make very large crucibles for melting pure silicon that gets drawn into boules up to 12" or more in diameter. These  boules are sliced into thin wafers upon which electronic circuits are developed for the electronics industry. This sphere was made by Richardson's Ranch about 20 years ago at a cost of about $7,000. Today it would cost about $50,000 to duplicate it.
Bob

Richardsons had a boule in the shop when I was there on a field trip once, and a slice from it. I remember there was a somewhat awful joke about 'pretty faces' and 'ugly faces' reflected in it, (depending on if it was a little girl or a little boy doing the looking.) The spheres are pretty cool. It's an excellent way to show a greater area of pattern, or how pattern carries through a rock. Love the nodules and dugway. How did you clean the dust and grit from the inside of the dugway?
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Sandsave
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« Reply #18 on: March 26, 2016, 06:34:27 am »

The geode required very little clean up, just flushed out with warm water. I think I'll try a few more to see how they turn out. The preform is almost gone when you start.
Bob that sphere looks like glass it's so clean looking. That's why I was wondering if it was glass.
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bobby1
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« Reply #19 on: March 26, 2016, 02:16:09 pm »

The fused quartz material is perfectly clear and flawless so its looks can be deceiving. Natural quartz is probably impossible to find in that size that is perfectly clear.
Bob
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Jhon P
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« Reply #20 on: March 26, 2016, 06:29:28 pm »

love the geode or any sphere with vugs or cavities. I have a few blackrock geodes that I keep saying that I a going to cut on and see if I can get spheres out of them.
 I would to love see the fused the quartz sphere in person, it must be amazing to look in to it, maybe some one could tell my future. Can you imagine the work that it takes to make it. I have to use my 24" saw to cut a big enough rock to make a 6" sphere, than grinding the preform must be a heck of a job. I have a 6" sodalite in the machine now and it was cut from a 55 lb rock.
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Jhon P
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« Reply #21 on: March 26, 2016, 06:39:55 pm »

Sand save what kind of machine do you have? and what do you use for grinding. I have use grit, hated cleaning up every time I change to a finer grit. I have used diamond powder or paste on pvc cups that worked good but still have to clean between grits to prevent contamination, I have the best luck using diamond powder for obsidian. Mostly I use diamond cups that I braze myself and diamond wet grinder pads for the rest of the grits.
Is there anyone else out there that is making spheres or just two of us that is crazy enough to do it.
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Sandsave
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« Reply #22 on: March 30, 2016, 06:23:52 pm »

I traded some electrical work for an old machine partially refurbished don't know the brand name. I used an old barbecue motor and arm to feed the grit. One of the gear motors died and I took the part to a machinist buddy and it was quite expensive to make just one gear. So I bought a Highland Park. There web site showed pic of a machine with the same GE gear motors as my old one. Big mistake all made in China including the motors, but thats another story.
I use diamond cups now and they're worth the money. I've only had to replace the 80 grit so far. I tried the diamond brazing rods but you can't beat the cups.
No real clean up between as your changing cups as you progress. No big mess I have 10" plastic bucket and only splash is when I drop a sphere into it by mistake.
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Jhon P
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« Reply #23 on: March 31, 2016, 01:39:13 pm »

I looked at the HP high speed machine but dud t want the bungie cord system, I two home built machine that came from an estate sale and they is the bungie cord. So when I bought the new machine I went with Covington three head and have never retreated it. Love all of different adjustments.  A friend of mine has a two head Covington that helped make my decision.
 So you must be an electrician?  Lol I am an electrial contractor here in Nevada.
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Sandsave
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« Reply #24 on: March 31, 2016, 05:02:22 pm »

I'm a contractor also, my crew averages between 20 to 25. Although I'm at 30 right now. Our commercial side is crazy right now, residential is average.
I went with the Highland Park so I would have extra gear heads and motors. That would inter change with each other. Didn't work out to well, had I known I would have looked around a bit more before buying the Highland Park.

I don't use a bungee I use multiple springs with different tensions so I can adjust. (3 Sets)

Here's a Sodalite I just finished last night


* image.jpeg (195.23 KB, 768x1024 - viewed 9 times.)
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Jhon P
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« Reply #25 on: March 31, 2016, 08:51:53 pm »

I finished my sodalite today when I got home, just needed to do the polish. funny that you finished a sodalite also. this one is a little over 6". the rock I bought was about 55 lb  the seller must of been in a good mood he only charged me $300.00  ura or he seen me coming and knew that I was looking for a big enough piece to make a sphere of at least 6".
 here is also the 6" rose quartz that I finished a couple of weeks ago, the rock I cut it from was 62lb but I was able to get three spheres out of it.


* photo (14).JPG (138.17 KB, 480x640 - viewed 9 times.)
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Jhon P
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« Reply #26 on: March 31, 2016, 08:53:17 pm »

Missed a picture dunno


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Sandsave
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« Reply #27 on: April 03, 2016, 06:52:03 am »

That sodalite is great, it's a lot darker than my material I like it. I'm working some Turritella they make great spheres. I'll post when finished.
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Jhon P
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« Reply #28 on: April 03, 2016, 01:04:57 pm »

the Sodalite came from Africa the lighter blue that I have came from Barzil. Do you know where Yours came from.
I have another piece from africa that is very dark, the cabs I have done look almost black in till you get bright light on them. I didn't do a sphere out of it, it cost me a lot more $ per lb. I only slabbed half of it I could still cut a 4" ball out of it.
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Sandsave
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« Reply #29 on: April 04, 2016, 05:20:55 am »

Same on the Sodalite, I did manage to get 6 -3 1/2" spheres. I don't usually buy anything. Usually self collected or trade for. Here is a Turritella sphere, I got this with a trade for Wyoming Jade.
I probably can two more from this rock, this one is 4"

Jay


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