man-made
Color is often considered the most unreliable characteristic of a mineral because it can vary widely even within the same mineral species. Factors such as impurities, alteration, and external conditions can all influence the color of a mineral, leading to inconsistencies in color as a reliable identification feature.
habit, color, streak, luster, density, hardness, cleavage, fracture, tenacity
Marble is primarily composed of the mineral calcite, which is a form of calcium carbonate. Other minerals found in marble can include dolomite, serpentine, and various other impurities that give marble its characteristic color and veining.
The characteristic used to determine the color of a mineral's powder is known as its "streak color." This is achieved by scratching the mineral against an unglazed porcelain plate to observe the color of the powdered residue left behind. Streak color can sometimes differ from the visible color of the mineral.
Cleavage is a physical characteristic determined by the arrangement of atoms within a mineral. Cleavage describes how a mineral breaks along planes of weakness due to its atomic structure, creating smooth, flat surfaces. The number and orientation of these planes are unique to each mineral.
Man-made
The characteristic property of the mineral pyrite is sand it is very shiny
rough, sharp
it is hardness
The mineral is hematite.
An accessory mineral is a mineral present in small amounts in a rock, but not considered to be characteristic of the rock.
color
It's wind.
It must be naturally occurring and crystalline.
metallic luster
man-made {apex}
Color is often considered the most unreliable characteristic of a mineral because it can vary widely even within the same mineral species. Factors such as impurities, alteration, and external conditions can all influence the color of a mineral, leading to inconsistencies in color as a reliable identification feature.