This website has been archived for historical purposes.
The Membrane Domain
Mohs' Scale
Mohs' Scale
Mohs' scale of hardness was developed by Friedrich Mohs and
measures the hardness of "rock" on a scale of 1 to 10
using
a scratch test. ie 2.5 can be scratched by a fingernail:
1=talc, 2=gypsum, 3=calcite, 4=flourite, 5=apatite,
6=orthoclase, 7=quartz, 8=topaz, 9=corundum, 10=diamond.
However, please keep in mind that each project is more like granite than a single element - hardness varies from song to song.