I'm sure you have seen that it is possible, but what if we want a metal ring with a gemstone on it?
We can, using soldering tin wire and a gemstone that has an excellent look and costs just about 2-3 couples of coffee.
Except the gemstone, we will use only materials and tools that almost everybody has already around house, that is always a good thing, beacuse trying to do something using only things that you already have leads to more Efficient use of resources, less waste and this is a good steep toward a greener planet... and also cut down costs ;)
Not to mention you don't have to out to buy materials and tools...
1) Use Lead Free Tin Only.
2)This instructable is for entertainment in making a piece of jewellery.
It is not supposed that you make a ring that you will wear for the rest of your life.
Instead it should be an item that you place on some cushion and say "I made it", or for your girlfriend to say "my boyfriend made it for me" when friends will come to your home
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Step 1: Materials
-Soldering tin wire
-A 3v battery, or 2 AA batteries, it doesent matter as long as it gives enough power to the
-Small electric motor (Usually requires 3v) to spin with enough power.
-A metal bottle cap and a small metallic object with a cilindrical shape
(Later we will discuss about it)
-Extra: some electric wires, small pieces of PVC or similar material, paper and pen, a solid cutter and some grinding paper.
Step 2: The Gemstone
You can of course use any kind of gemstone you want, or re-use one from a broken pisece of jewelery, or grow one yourself... I'll leave this to you.
I didn't have any gemstones around, so I Have serached for a nice gemstone with a very low cost, and ended up with this one, ordered from an ebay seller for about 2-3 Euros (3-4dollars).
It has a diameter of 6mm, 2,57 Karat, and is very clear with very little inclusions.
This was the only part I had to buy, and i am still impressed how these ultra cheap gemstones are nice and shiny and cool ;)
Step 3: Design the Ring
Decide who will wear it.
With a ring template (you can find as many as you want making a Google search of "Printable Ring Size"), measure which ring size he/she has.
The image below is from "How to Determine your Ring Size", By XaGeJa, eHow Member.
Once you have done it, here's the little difficult part: find a small, cylindric metal object around your house, that has exactly the same size of the finger's diameter.
(You will find it, I can assure you, it is easier than you may think ;)
Step 4: The Mold
Step 5: Prepare the Wire
Step 6: Prepare the Casting
Step 7: Tin Melting
You can then add some more 8-shaped tin pieces and melt again until you have a solid ring about 5-6 mm tall.
Remove the cap and the cylinder and you should get...
Step 8: The (raw) Ring
Step 9: The Homemade Milling Machine
The machine is made by cutting 3 rectangular pieces of PVC 3mm (or similar material).
One will be the base, the other 2 will keep the motor in place.
The motor should be connected th its battery with a switch.
A circle of PVC is cut, with a hole in the middle so it can be put on the axis of the motor.
The tin ring will pe pressed around this adaptor so it should be the same size of the inner diameter of the ring.
By rotating the Tin Ring, and working with a cutter and grinding paper as is spins, you can give the Tin Ring its right profile.
Step 10: Refining the Ring (1)
Step 11: Preparing the Gemstone Socket
Finally, Solder 4 balls of tin on the side of the tin disc.
Carve the inside of the disc making the gemsotne socket. Put the gem in it, look if it is deep and cetered enough, repeat until it is done. (Picture 3)
Step 12: Shaping the Gemstone Holders.
Solder another 4 balls of tin over the previous 4, put closer to che center of the disc, so they will hold the gemstone in place.
Repeat with another 4.
Step 13: Final Refining
Finally, with very fine grinding paper, finish the ring removing all the imperfections and making it shiny and smooth.
Very well done ;) Now you have a ring that you can give to your girlfiriend with pride ;)
If you like this instructable, please rate it ;) For the Epilog Contest ;)