Calcite belongs to what mineral group?
Carbonate class The carbonate minerals consist of those minerals containing the anion (CO3)2- and include calcite and aragonite (both calcium carbonate), dolomite (magnesium/calcium carbonate) and siderite (iron carbonate). Carbonates are commonly deposited in marine settings when the shells of dead planktonic life settle and accumulate on the sea floor. Carbonates are also found in evaporitic settings (e.g. the Great Salt Lake, Utah) and also in karst regions, where the dissolution and reprecipitation of carbonates leads to the formation of caves, stalactites and stalagmites. The carbonate class also includes the nitrate and borate minerals.
Change'em when they're showing wear or stop wiping well. Yes, you can change them yourself. About $8 a pair instructions are included.
You can get a pair at your local auto parts store or pick a pair at your local wal-mart for around $8. They last about a year
I am a geologist, and I would love to help you, but I sucked so bad at mineralogy (not to mention that I'm color blind so that wasn't a help either). If I remember correctly, isn't dolomite a chemical alteration of limestone/mudstone/silstone over time? If correct, couldn't you look at the stratigraphic column for the site and look at the amounts of limestone present. Again, if I remember correclty; isn't high Mg Calcite a low grade metamorphic rock, whereas everything else is sedimentary.
They're usually about $10 for each one. They're very easy to change, and the should come with instructions on how to do so.
