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Messages - Rusted

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Gemstone Faceting / Re: Magnetic toppers for Master laps
« on: February 21, 2020, 08:17:36 AM »
I scored mine with my original faceting machine, I think the bloke that owned it bought every gadget known to mankind.
I thought it was a good idea at first, then gradually came to the realisation that it was just something that didn't need to be there, the nut has to be done up anyway so why bother.

Gemstone Faceting / Re: Magnetic toppers for Master laps
« on: February 19, 2020, 06:38:11 PM »
My magnetic sheet is about 1mm thick, It is glued onto an Aluminium master lap.

Ask a "Silly" Question / Re: Dopping Stones
« on: February 09, 2020, 12:47:43 PM »
If you are having trouble with the stones sticking when dopping mix up a bit of flake shellac with some metho and paint that on the back of your stone before you dop it. You don't need much just a bit in a small vegemite jar and paint it on with a cotton bud.

Gemstone Discussions / Re: Can you name and roughly appraise these gems?
« on: February 07, 2020, 08:44:46 AM »
Just Guessing, It's very hard to ID from a photo.

Topaz, pretty sure.
Garnet of some kind, possibly Almandine, pretty sure on Garnet , unsure which variety.
Rose Quartz? unsure but likely.
Fluorite? unsure, Would need to have in hand to ID properly.
Beryl or Tourmaline? Would need to have in hand to ID properly.
Sapphire? Likely, but, Would need to have in hand to ID properly.

I think you would struggle to get anyone at a lapidary club to offer an appraisal, they are amateurs, keen and knowledgable but still amateurs, they may be happy to help with an ID though.

Ask a "Silly" Question / Re: Dopping Stones
« on: January 29, 2020, 03:26:50 PM »
Dopping wax of the faceting variety or cabbing variety does go off after a long time, something evaporates out of it and it just goes rubbery and will not melt. I have experimented and as far as I know there is no way to rejuvenate it.

As far as sealing wax goes I guess it's the same, dopping wax is just sealing wax with shellac and a filler. From memory an original recipe from the 1960s was shellac and plaster of paris mixed with the melted sealing wax. POP would be better than clay as it has a low hardness, who knows what the clay minerals hardness is and what it would do if it got onto your polishing lap or pad.

Ask a "Silly" Question / Re: Can you refreash laps?
« on: January 14, 2020, 01:37:21 PM »
There's not a lot wrong with that lap.
Best would be to get it to an engineering shop and get them to reface it.
Second best would be to give it a scrub with a scotchbrite pad with a bit of acid. soldering spirits or brickcleaning acid (Hydrochloric) would remove the corrosion in seconds. Careful it removes skin too, failing that vinegar or even Coke will do it but will take a bit longer.
If you use acid don't forget to neutralise it after by scrubbing with soap or bicarb.

Ask a "Silly" Question / Re: Can you refreash laps?
« on: January 08, 2020, 02:43:42 PM »
Ooh if they are the solid metal ones do everything you can to salvage them, they are really good laps.

Ask a "Silly" Question / Re: Can you refreash laps?
« on: January 07, 2020, 02:38:18 PM »
Give them a go. Anything that still works keep in your armoury.

Finer laps can get clogged with dopping wax or glue and stop cutting, I have found that scrubbing with a solvent like acetone or turps sometimes makes all the difference. You might be able to remove the rust spots with a bit of acid or just give them a rub with some fine wet and dry.
Laps also wear out and only worn grit is exposed keep those ones for softer stones where you don't want quick removal of material.

Worn useless laps are also the bees knees for use as a sharpening stone, great for chisels, knives, scissors. They can be mounted on the shaft of cheapy bench grinders to make even better sharpening machines.

Ask a "Silly" Question / Re: Possibly Silly Question from Newbie
« on: December 29, 2019, 02:20:32 PM »
Welcome Cherub.
Give us an approximate idea of where you are and we can probably recommend some clubs, localities and maybe other resources that will give you a bit of a start.

Cabbing and More / Re: making sphere beads
« on: December 16, 2019, 08:33:38 AM »
I am pretty sure you wont find anything like what you are after, you will find drill bits for drilling the hole but not shaping the tiny sphere.
Rock beads can be done but use a completely different process. Look for "bead mill". Basically two iron plates with matching grooves machined into them, one spins, the stones are put in the groove with grit and they just roll around until they are spherical.

General Discussion / Re: Unpleasant Gemstones
« on: December 04, 2019, 02:29:24 PM »
Unpleasant creations, just doesn't have that "I must buy this now" ring about it does it?

Good machines hold their value really well. So though several thousand dollars looks a lot consider it an investment that you will get a lot of pleasure from and if you decide that it's really not your thing will be easily able to sell it for similar money.

Ask a "Silly" Question / Re: An old thunder egg
« on: October 29, 2019, 10:28:11 AM »
Welcome to the forums
That Diggers rust and stain cleaner is Oxalic acid, when you have finished cleaning thunder eggs it's good for cleaning wood decking too.

Ask a "Silly" Question / Re: An old thunder egg
« on: October 29, 2019, 07:07:12 AM »
The crystals have probably taken a coating of tannen from the plant material, try brushing some White King onto them.
Or it could be Iron stains, Diggers Rust and stain cleaner available from Bunnings will remove it.
If it's Calcium (lime) a long soak in some vinegar will help.
 Don't mix the above three chemicals and wear protective gear (gloves and glasses) when doing it and do it outside.

I'm glad someone else is scratching their head.
Talking Gemmasta here.
The surface where the lap spindle bolts should be perfectly level and aligned with the surface that the base of the mast clamps to. As far as I know they look like they would be machined at the same time. Severe wear on the mast clamping surface could eventually throw things out but I would look at having everything machined flat again if that was the case.
I have found the base of the mast on several machines including my own not being perpendicular to the mast. A slight cut off the mast base with the mast swung between centres remedied that.
One machine I checked someone had shimmed the platen spindle to compensate, but any change in the orientation of the mast base threw everything badly out of wack, this was the first machine I found the mast base needed machining.

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