My Mineral Web Mineral
Hardness 3-4 3.5-4
Cleavage 3 perfect 3 perfect
Luster vitreous; silky vitreous; pearly
Streak white white
Color pale rose pink; gray pale rose pink; gray; brown-white
Other No HCl reaction; cannot scratch glass
Table 1. My physical property test observations versus the Mineralogical Society of America Mineral Identification Key found on the web.  Miscellaneous details that helped me further determine my unknown mineral are listed under "Other".