Quartz is very resistant to both chemicals and heat. It is therefore often used as a foundry sand. With a melting temperature higher than most metals it can be used for the molds and cores of common foundry work. Refractory brick are often made of quartz sand because of its high heat resistance.Quartz sand is also used as a flux in the smelting of metals.he high hardness of quartz, seven on the Mohs Scale, makes it harder than most other natural substances. As such it is an excellent abrasive material. Quartz sands and finely ground silica sand are used for sand blasting, scouring cleansers, grinding media, and grit for sanding and sawing.
ANSWER What kind of flour do you mean? 1 US teaspoon contains 2.5 g wheat flour, 3.5 g potato flour, 3.2 g corn flour.
If you were to use the easier calculation of rounding a teaspoon of sugar to 4 grams, then you would have had other numbers. For example, 20 teaspoons x 4 grams, would have equal to 80 grams instead of the 84 grams shown in the table. It is almost an extra teaspoon in difference from the correct amount. This might not be a big deal, but it adds up if you think about it.