Light Colored Earthy Minerals

PHYSICAL PROPERTIES

MINERAL NAME, FORMULA

Most commonly WHITE  or CLEAR, but other colors are possible;EFFERVESCES (fizzes) IN DILUTE HCl acid; H=3. CALCITE, CaCO3
Most commonly WHITE, PINK, or GRAY; commonly in fine-grained granular masses; REACTS WEAKLY WITH HCl acid (slowly or  only if sample is powdered); H=3-3.5.DOLOMITE, CaMg(CO3)2