Petrographic examination is required for identification of specific types of granitoids. Granite differs from granodiorite in that at least 35% of the feldspar in granite is alkali feldspar as opposed to plagioclase; it is the potassium feldspar that gives many granites a distinctive pink color.etrographic examination is required for identification of specific types of granitoids. Granite differs from granodiorite in that at least 35% of the feldspar in granite is alkali feldspar as opposed to plagioclase; it is the potassium feldspar that gives many granites a distinctive pink color.
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How many dots on full set of dominoes? Each number appears once with every other number and once with blank and once with itself. So for 1 there are 0 - 11 - 12 - 13 - 1 4 - 15 - 16 - 1 and, as the double-1 must bâ¦e included twice, there are eight 1s in a set. Similarly, there are eight of all the other numbers too. So, as 1+2+3+4+5+6 = 21 and 21x8 = 168, there are 168 dots on a blank-to-six set of dominoes.