Yes they are rock you should know right :)
Limestone is a sedimentary rock that is composed largely of the minerals calcite.
Limestone is a sedimentary rock that is composed largely of the minerals calcite.
Limestone mainly consists of the minerals calcite and aragonite. It is considered to be a sedimentary rock with marine organisms.
Quartz, with a hardness of 7, will scratch calcite, with a hardness of 3.
Quartz because its harder than calcite and the quartz in thicker.
The 'common' or rock-forming minerals, such as quartz, feldspars, micas, calcite, etc.
apatite will not scratch quartz topaz calcite or corundum
You can distinguish quartz from calcite by conducting a hardness test, as quartz is harder than calcite. Additionally, you can test for effervescence with acid - calcite will fizz in acid while quartz will not react. Lastly, observing the cleavage patterns can also help differentiate the two minerals, as quartz has no cleavage while calcite has rhombohedral cleavage.
The major differences between quartz and calcite are hardness and cleavage. Quartz is about twice as hard as calcite. Quartz has little or at least very seldom any sort of obvious cleavage, whereas calcite has excellent and very obvious rhombohedral cleavage.
Quartz is harder than calcite, making it more scratch-resistant. Quartz also has a higher melting point than calcite. Additionally, quartz is typically transparent or translucent, whereas calcite can be transparent, translucent, or opaque.
Gold, hematite, calcite, and quartz are all mineral elements.
Calcite is the opaque compound calcium carbonate (CaCO3). It will dissolve in carbonic acid and will fizz in stronger acids. Quartz is the usually transparent compound silicon dioxide (SiO2). It will not dissolve in acid.