Calcite is usually identified by using the acid test. The test is done by putting some drops of weak hydrochloric acid on a sample. If the sample fizzles or reacts, it is calcite.Continue Reading
Rocks such as marble and limestone also fizzle during the acid test. This is because they contain calcite.
Calcite, a carbonate mineral, is characterized by its Mohs scale hardness of 3 and specific gravity of 2.71. It is usually colorless or white. The presence of impurities can give it shades of red, yellow or gray. Calcite is found naturally in marine organisms' shells as well as in stalagmites and stalactites.Learn more about Geology
The mineral halite, also known as salt or sodium chloride, is formed by the evaporation of brine lakes or ancient seas. This mineral form of common table salt can be found across the world in massive sedimentary beds, or salt beds, which are the remains of dried up inland seas. In some areas, halite is found within salt domes, which are underground deposits of halite and other evaporite minerals that are pushed up to the surface by pressure from overlying rock.Full Answer >
Biotite is a mineral that can be found ubiquitously across the world, according to MinDat.org. It has been recovered from every continent on Earth with the exception of Antarctica.Full Answer >
The hardest natural mineral in the world is lonsdaleite, a rare mineral made of carbon atoms. This mineral can withstand up to 58 percent more stress than diamond, according to a report by Jessica Griggs of NewScientist.Full Answer >
Some interesting mineral names include Moolooite, Goosecreekite, Dickite, Cummingtonite and Eurekadumpite. Minerals, inorganic solids with crystalline structures that are found in nature, also include Beaverite, Belovite, Parisite, Pyropissite and Swedenborgite.Full Answer >