fluoresence is not a factor. I had this same question and i got fluorescence as a correct answer
Mineral is formed by crystals and is inorganic
A mineral.
Metamorphic rocks that consist of only one mineral and have large interlocking crystals often have a coarse-grained texture. This means that the individual mineral grains are easily visible to the naked eye. Examples of such rocks include quartzite (formed from quartz) and marble (formed from calcite).
No. Obsidian is formed by the very rapid cooling of lava which means that crystals do not have time to form.
Both are formed from the crystallization of minerals caused by the cooling of magma. Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material. Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
fluoresence is not a factor. I had this same question and i got fluorescence as a correct answer
evaporation
Mineral is formed by crystals and is inorganic
A mineral.
Large mineral crystals that are all about the same size are formed from magma that cooled slowly inside the earth. Small mineral crystals (not identifiable without a microscope) formed from magma that cooled rapidly, on or near the surface of the earth.
The main factor is time spent in cooling and solidifying. More time means larger crystals.
Usually, the determining factor is the size of the mineral crystals in the rock. Igneous rocks that have solidified above ground cool quickly and have less time for larger crystals to grow.
Intrusively.
Yes. When magma cools and solidifies, mineral crystals are formed.
evaporation
Yes. When magma cools and solidifies, mineral crystals are formed.
Yes. When magma cools and solidifies, mineral crystals are formed.