There are a couple of nonames from India and Chine. The one I currently use is called "Allume Di Rocca Naturale". Distributed by an Italian company but made in China. The cost was around 2.
Bloc Osma is a fine alum block: smooth, sturdy, and generally devoid of cracks.
Having said that, it is also rediculously overpriced, considering that you can get a less pretty, perhaps slightly more fragile block for about 1/4th the price.
I think my bloc Osma was about $11.00. Knowing alum blocks, I reckon this will likely last me about 2 years. This works out to about .015 cents/day if I figure correctly.
No problem. If you dig the Osma, splurge. Life is short and you probably have the .015 cents/day to spare, even over the next two years.
444 alum block is just as good as OSMA and for a fraction of the price:
I am happy for I can still buy these ones for about 1,50 in stores around the corner here in Portugal.
This alum block is made by the makers of the well-known 444 aftershave mentholated gel.