@best-groove
That is interesting, and to be honest its difficult to find out what the body is made out of. Ortofon just calls it black sapphire. However I did locate this bit of info regarding developed by an Ortofon dealer in Australia I believe.
"MC 5000
The black ceramic body, sintered at approximately 1,200 degrees Celsius, is a rigid structure that eliminates resonances in the audible range.
Mounted on a sapphire cantilever, Ortofon’s Nude Replicant diamond is cut to match the sapphire which cut the record groove as closely as possible.
MC 5000 is a highly accurate, analytical and neutral transducer.
All available information is retrieved from the grooves and music is crisply reproduced with palpable presence that converts your living room into a concert hall.
A reference-grade audio system is required to reveal these qualities.
Because output is relatively low, a high-performance MC transformer or MC preamplifier should be used. Recommended load: 20 – 100 Ohms.
MC 3000 Mk II
Housed in the same body as MC 5000, this cartridge also employs the same Nude Replicant diamond, but mounted on a conical aluminium cantilever.
MC 3000 Mk II has a strong sonic resemblance to MC 5000, with a milder, gentler, more laid-back style, while maintaining the integrity, power and authority of complex orchestral works.
The listening room is experienced as an integrated part of the concert hall.
As with MC 5000, the low output requires a high-performance MC transformer or MC preamplifier with a recommended load of approximately 50 Ohms. The actual load, is, as always, a question of personal preference. A lower value will allow the sonic image to snap into sharper focus, while a higher value will have the opposite effect."
If the body were aluminum I don't think anyone could tighten a head shell bolt that tight to break those mounting tabs as they are quite thick.
