Your teacher gives you two kinds of transparent minerals. She says to you, one is diamond and the other is quartz. If you can identify a diamond, you can keep it. How do you decide which diamond is which diamond and which diamond is quartz. Which mineral is more valuable? why?
3. Confirm metal ores and non-metal ores used in daily life. Please tell me how to use each ore
You have two kinds of pink minerals. One is calcite and the other is quartz. Explain two ways to identify each mineral
Suppose there is a rock made of large and small mineral crystals. Can you guess how minerals are formed?
You have four mineral samples - one is brown, one is silver, one is red, and one is black. The three samples are the same mineral. Please describe the tests you can do to determine which mineral samples are the same mineral
Hardness is one of the excellent properties of minerals used to identify minerals. Hardness is a measure of scratch resistance of minerals. Mohs hardness is a group of ten minerals whose hardness is known. The softest mineral talc with Mohs hardness of 1. Diamond is the hardest mineral in grade 10. The soft mineral can be scratched by hard minerals, as the force holding the crystals together is weak and may be destroyed by hard minerals. Cuts are defined using two sets of criteria. The first standard set explains how easy it is to get cuts. Cleavage is considered perfect if readily available and easy to disassemble. Although cleavage creates some difficulties, it is considered good if it has a clear cleavage plane. Finally, it is difficult to obtain cleavage and if some planes are indistinguishable, it is considered incomplete.
Cleavage is a very important mineralogical property. Cracking of minerals is the tendency of minerals to break or separate along specific surfaces. This occurs because some minerals are weakly bonded between atomic layers arranged in one direction than bonds between other layers. Therefore, when a cleavage mineral is destroyed, it splits and leaves a clean surface parallel to the weakened region (called a cleaved surface). The cleavage planes appear at specific angles to each other. This is a feature of minerals and it helps to identify minerals. The cleavage pattern is controlled by the internal arrangement of atoms and their structure. The direction in which cleavage can occur is controlled by the internal crystal structure of the mineral. Cleavage occurs along such a plane where bonding between atomic layers is weak
By definition, minerals have characteristic atomic arrangements. The weakness of this crystal structure leads to a weak plane, and bursting of minerals along these planes is called cleavage. The quality of cracking can be explained based on how clean and easily destroyed minerals are, and the general descriptors are "complete", "good", "different" and " Poor ". With transparent minerals or thin sections in particular, cleavage can be thought of as a series of parallel lines marking a flat surface when viewed from the side. Cleavage is not a universal property in minerals; for example, quartz composed of widely interconnected silica tetrahedra has no weakness of crystallinity that allows for cleavage. In contrast, mica with complete substrate cleavage consists of a silica tetrahedral sheet which is fixed very weakly to each other.