No, no, no, and no. They are all the same ting just different sizes but they are all small.

Wire drawing dies?

Wheels or rollers.

beads?

No

Hint:
Very good thermal conductivity.

still do not know what they are. but are they made of ceramic?

No these are not made of ceramic but some are.

Hardness of 2300 HV
Compression strength 2100 mpa
Women love them

Lets see - with those specs it could be either Sapphire or Ruby - some sort of Jewel bearing assembly?

They look more 'industrial' than jewelry to me...

Are they used as some kind of electrical insulator that transfers heat quickly?

You can get custom whittled jewelled bearings, and instrument parts made from industrial ruby / diamond / sapphire etc. We used to get orifice plates made that used Sapphire since they dont wear down very quickly.. material looks the same

Quote from: Badot on March 24, 2013, 11:37:15 AM
They look more 'industrial' than jewelry to me...

Are they used as some kind of electrical insulator that transfers heat quickly?

Not a bearing and not an insulator. Yes industrial.
Kiwingenuity is getting warmer.

sapphire water jets

used in watchmaking? as in a 15 or 21 jewel movement? does look like that. id say im wrong though

Quote from: oldmech on March 24, 2013, 12:40:48 PM
sapphire water jets

You nailed it. They are used in the nozzle of high pressure water jet cutter/driller. It's amazing what these thing can cut trough. I use one a long time ago for cutting Kevlar and other armor plating used in military applications.  The jewel orifice (ruby or sapphire) embedded into one of these and is part of the head.

this game is always an educational experience. thanks for posting that. never would have thought.
here is the next one.

sorry pliskin i meant to say. never meant would have thought sapphires where used for that. as you get older your brain some times gets ahead of your digits great challenge sir. hats off to ya.

That looks like the pressure regulator that sits on top of a pressure cooker.

well that was quick ! your up again dude. forgot you do gardening also.
make it a fun one!

My mom canned when I was kid, and still does. I listened to that rattle for more hours than I care to count.
I'm going to pass the torch to whoever wants it next. I need a break. Anybody want to give it a go?

i will give it a pass on bow out for a spell. kiwinginuity is always throws up good one. if not who ever get here first i guess?