I have looked at pictures of all of them and they all look the same....i need to know these for a test in my class and i can not taste the halite and sometimes the calcite does not fizz when i dropw acid on it....
2007-03-07 13:46:59 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Water dissolves only the halite, hydrochloric acid dissolves only the calcite. Neither does anything to quartz. (Make sure it is a fresh surface).
Halite has a hardness of 2 1/2, calcite 3, and quartz 7, so you could see which scratched the other, the quartz will not be scratched by the other two and the halite will not scratch either of the others. The calcite should scratch the halite only.
The same volume of halite is not as heavy as the same volume of quartz, which in turn is not as heavy as the same volume of calcite. Specific gravities are 2.17, 2.6 to 2.65, and 2.71 respectively, so that might be a close one if you have small samples or imprecise equipment.
2007-03-07 13:52:29 · answer #1 · answered by Now and Then Comes a Thought 6 · 0⤊ 0⤋
Calcite And Quartz
2016-12-14 18:16:38 · answer #2 · answered by behl 4 · 0⤊ 0⤋
Hi. Experimentally? Quartz is silicon dioxide and is not soluble in water. Halite is sodium chloride and WILL dissolve in water. Not sure how to test for calcite.
2007-03-07 13:52:39 · answer #3 · answered by Cirric 7 · 0⤊ 0⤋
The field guide for Rocks and Mineral of North America is a very good resource for this topic!
2007-03-08 12:21:17 · answer #4 · answered by Anonymous · 0⤊ 0⤋