Author Topic: Cab size?  (Read 2373 times)


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Cab size?
« on: November 22, 2009, 11:27:48 PM »

This may belong to the "Ask a silly question' part of the forum but it seemed to fit here also ...

I'm wanting to send a range of stones (maybe amethyst, ribbon stone, prehnite etc) overseas for cabbing.  As the cutter (or should I say cabber?) charges on finished carat weight, I don't want to be charged for overly thick cabbed stones.

As I haven't done any cabbing or even have any finished product on hand, I'm wondering what thickness I should specify?  The cabs I'm seeking will be round or oval and may range in dimensions from perhaps 2cm to 5cm. 

Also, should the thickness vary depending on whether the material is transparent (eg. amethyst) versus opaque (ribbonstone)?

I should also note that I don't have a trim saw so have to send some fairly rough materials ... even more reason to specify a thickness I guess.

I've attached a pic of typical amethyst material I might want cabbed ... although with a few less fractures.

Yours in cabbing ignorance,




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Re: Cab size?
« Reply #1 on: November 23, 2009, 12:20:58 AM »
LOL Fullerton , how thick do you like a sandwich?  ;)

On those sizes you'd probably want them no less than 5mm and no more than say 7.5mm. You could certainly mix and match those profiles over any of those sizes for a variety of dome heights.
On the 2 to 4 cm ones you could even go uo to 9 or 10mm for a chunky look. You'd just want to watch the weight of the 5cm ones, think I'd go max 7.5 there.
With the transparent ones some jewellers will use an open back setting to allow it to be seen through in a pendant, others don't but 6mm should still allow light to pass.
There again on the flip side tablets are nice too eg flat cabs.
Got you confused yet?
Keep em comin!!!


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Re: Cab size?
« Reply #2 on: November 23, 2009, 12:46:42 AM »
Yes, that's the info I'm after ... and I've seen the open back settings before.  Not confused ... but don't ask any hard questions or that could change. 

I think I'll just send over a few items (with specifications) to see what comes back. I sent a small consignment over to Thailand a couple of years ago ... ended up with what looked like marbles cut in half!!!  A quick lesson about those who cut and charge for maximum carat weight.

I think I'll have to spoil myself with a trim saw - grinder - polisher thingy one day.  Have been eyeing off the LU6X-130 COMBINATION Unit TRIM/ARBOR!!!

Keen but green,


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Re: Cab size?
« Reply #3 on: November 23, 2009, 01:00:28 AM »
I noticed they had a handy jig for doing cabs too not that long ago.
It's good to be keen, just makes it that bit sweeter when you finally get your machine.
Keep em comin!!!

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