Hopefully someone will find this useful:
http://mrgibson.com/rock_spar_min/Catalog_Note.php?view=0
The table is arranged by Mohl's hardness scale. Note: I do realize it is still far from complete and formulas can be made better .
Linux, Cars, Coding, Classic Gaming, Base Ball Cards, and overall personal blog. Just another blog of a baseball card collector and geek. Older blogs can be found at http://mrgibson.com/
I spent $80 to buy an untested CoCo 2 that was advertised as "Vintage Radio Shack Tandy TRS-80 64K Color Computer 2 Video Game Console...
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