Tonearms of exotic materials- esp. Carbon?

Beware of the acoustic energy that will be in the room and act on the arm and cartridge. Having said that, it would appear that a ceramic material would be the best as it would have the lowest resonances. All the metals will 'ring', easily proven by hold your finger against the arm while a disc is being played. Of course, if you have an acoustic screen around the platter/arm, that would be best, also.

Thank you for all the excellent responses so far.

Pretty much, my intent was to turn up info on various tone arm materials used.

I find it interesting that different approaches have been taken- wood, carbon fibre, boron, ceramic, titanium, and other materials.

Tone arm material is just one factor of many in regards to the end result and sound.

I have a pair of carbon fiber arms and a pair of titanium arms in my stable currently, and find both to perform quite well.

I am able to enjoy all of them very much.

I enjoy the added discussions here regarding the effects and influence of various materials on the sound, and do hope to see more.

My original inquiry was quite humble though- just looking to see what materials have been used in manufacturing tone arms.

Micro Seiki CF-1, CF-2, CF-3, MA-707 had carbon fiber arm tubes.

Harman Kardon T-60 had a carbon fiber tonearm by Ito.

I have a Well Tempered Reference w/carbon fiber arm.