Lapidary Steps. How to Make Cabochons - Every Step! Rough to Finished Piece in 4K video!
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- Опубліковано 9 жов 2023
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In this video shows how to do Lapidary work. I tell you about the Thulite stone I will be cutting. I show how to mark the stone using a trim saw to cut it into pieces. I dop the Thulite using dop wax and dop stick and grind the stone to the shape of a cabochon. I show how to use each grit wheel from 80 grit to 3000 grit and then the final polishing stage using crime oxide powder.
I use Thulite in this example, a stone from Norway that cuts similarly to many jasper stones.
All the best, Michael
Here is a little info on the Thulite.
Thulite (sometimes called rosaline) is a translucent, crystalline, or massive pink manganese-bearing variety of the mineral zoisite. Manganese substitutes for calcium in the structure with up to two percent Mn2+. Thulite is often mottled with white calcite and occurs as veins and fracture fillings, transecting many rock types. In mineralogical literature, thulite may sometimes refer to any pink zoisite. Clinothulite is the manganese-bearing variety of monoclinic clinozoisite. - Розваги
Many years ago at a rock & gem club meeting, one of the members demonstrated his method of grinding - sanding cabachons on a home-made lapidary machine. When he got to the polishing stage, he used a disc of shag rug rubber cemented to a spin disc and Cerium oxide for the polish. I have used the rug/cerium oxide method for years. The polish shine is very high/lusterous on all the cabs I did, especially agates. Just a suggestion.
Enjoyed the video very much. Your explainations are very good.
I just ordered this machine and you presented such a great video!
That is a lot of effort for such a valueless stone. Loved it, thanks.
Thank you very much great video
Glad you liked it!
It's troublesome, but the results are beautiful. Thanks for the detailed video.
Thank you! Cheers!
So quick correction at 32:21
The physical speed is what is increasing while the RPM is what remains constant. If the wheel is running at 60 RPM the surface speed at the axis of rotation will 0 while the surface speed at 6 inches will be over 1.5 feet per second. Fantastic video, liked and subbed, I hope to see you hit 10k soon!
Lol. Thank you I really appreciate your support. 😊
nice rock man and great cutting
Thanks 👍
Thank you 😊
Good!
Thanks!
I just found your channel Do you ever freeform your stones?
Great video! You mentioned the type of blade was important, but I didn’t hear what type of blade you are using, other than a 6”? Thanks😊
Do you feel like a trim saw will work for making slabs for cabs versus using a slabbing saw. I don't know how difficult it is to get an even cut for cabbing without a slabbing saw because I've not used a trim saw before.
This has been a helpful video as I am just getting started. On some stones, like Amethyst, I get sort of a ragged edge around the cab. The 80 wheel doesn't seem to take it off but the 220 wheel seems to make it worse. Is there a technique for this?
I got lots of rocks. 😊 check out some of my agates and quartz petrified wood all kinds. Rock hounding most of them
Very nice and complete. (You don't ship the rock saw to Canada?)
Hello, unfortunately I don't. But I can connect you with a Canadian dealer. May I know your location in Canada?
@@GotchaRocksJewelryDIY Fredericton NB
أن أمكن ماهي قيمة ماكنة الكيبنك $
When you described the minerals in your piece of thulite around 0:50 in the video, you said that the white mineral was calcite and is a softer mineral than the zoisite, which is true. Calcite is a 3 on the Mohs scale while zoisite is a 6.5 to 7. But the white mineral in thulite stone is NOT calcite but likely is simply quartz. Did you test your thulite with hydrochloric acid (HCl) to see if the suspected white spots of "calcite" effervesced? I tested some slabs of thulite I have with HCl and none of the white minerals were effervescent. I also tried to scratch the white mineral and compared it to a known sample of calcite that I have. The white mineral was definitely harder than a Mohs 3, so there's no way that they're calcite. They could be a plagioclase feldspar or they could be quartz. Either of which is likely since thulite is mined from an area of regional metamorphism. I bought my thulite rough from a Norwegian vendor (Hausen Rock Treasures) at the Tucson Kino gem show this year. I asked one of the company owners if the included white mineral is quartz and she confirmed that it is quartz. So the bottom line is that the two dominant minerals in thulite are of nearly equal Mohs hardness at 6.5 to 7. Didn't you notice that when you were cutting your slabs?
Thank you for your comment and I'm sorry to hear that my description of Thulite upset you.
I often mention softer minerals in stones as a way to help warn people or guide stone cutters of potential pit falls that they may run into while cutting different types of stones. Yes, the Thulite that I cut did indeed have white quartz in it. That being said, I have had other samples that did indeed have a larger amount of calcite deposits.
The point of the video was to guide people through the cutting process while giving them information that could help them have a higher success rate when making a cabochon.
Here is my description of Thulite.
Thulite (sometimes called rosaline) is a translucent, crystalline or massive pink manganese-bearing variety of the mineral zoisite. Manganese substitutes for calcium in the structure with up to two percent Mn2+.Thulite is often mottled with white calcite and occurs as veins and fracture fillings transecting many types of rock. In mineralogical literature, thulite may sometimes refer to any pink zoisite. Clinothulite is the manganese bearing variety of monoclinic clinozoisite.
All the best, Michael
@@GotchaRocksJewelryDIY Thanks for your reply Michael. Your description didn't upset me, I was just trying to clarify things. I also wanted to find out if you performed any simple mineral ID tests on your slabs, which you have yet to answer. Your description of thulite is still confusing and inaccurate. What is your technical reference for this description? It conflates minerals (i.e., zoisite) with rocks (i.e., thulite). They're not synonymous. Rocks are composed of assemblages of various minerals.
Do u have templates for sale?
Where did you find your templates, I love that they're two sided!
Hello, the templates are 35 year old that I found in Ohio. Here is a link to a company that still sells them. You will just need to order two and connect them. Thanks for watching. arrowheadlapidarysupply.com/products/gem-temp-single-templates/1608/c45/
Just stumbled over this art and I'm so fascinated. Thank you for your video.
What kind of polish are you using on the side flat lap?
Thanks for asking I’m using Cerium oxide.
@@GotchaRocksJewelryDIY thanks. I use the white version. Is there a difference between white or pink.
As I understand it, it is the amount of manganese present in the stone. The larger the amount the pinker or more red the thulite.
@@GotchaRocksJewelryDIY thanks for the explanation. I appreciate it.
I just don’t get you Agate heads…. Turquoise is where it’s at!!!
Thats actually a great reccomendation the price is attractive but Turquoise is one of the most commonly faked or imitated minerals on the market.