Which property within the crystal structure results in the formation of different colors and varieties of quartz?

Which scale helps field geologists to roughly identify minerals using scratch kits?

Which is a natural shape of the mineral before cleavage or fracture is developed?

What do you call the weak plane that is developed after the crystal is formed?

Which is the measure used to express the density of a mineral?

Which fracture occurs in amorphous or fine-grained minerals such as flint, opal, or obsidian, and crystalline minerals like quartz?

Which refers to the quality and intensity of reflected light exhibited by the mineral?

Which refers to the measure of the resistance of a mineral (not specifically surface) to abrasion?

Which minerals form as individual elements?

Which characteristic is inherent in every mineral?

What mineral is represented by PbS?

Identify the classification of Ca2Al3Si3O12(OH), known as Tanzanite.

Which category does the element Au (Gold) fall into?

What is the classification of BaSO4 (Barite)?

What type of mineral is CaSO4·2H2O, also known as Selenite?