luster
luster
luster
A mineral's ability to reflect light is a test for its luster. Luster describes how light is reflected off the surface of a mineral, and it can be classified as metallic or non-metallic. Metallic luster is shiny like metal, while non-metallic luster can be categorized further into subcategories like vitreous (glassy), pearly, or dull.
luster
luster
Ultraviolet light is used to test minerals because it can cause certain minerals to fluoresce or emit visible light when exposed to UV radiation. This fluorescence can help identify the specific mineral present in a sample based on its unique color and intensity under UV light.
Geologists use the Mohs scale of mineral hardness to determine the relative hardness of a mineral by scratching it with minerals of known hardness. The scale ranks minerals from 1 (softest) to 10 (hardest) based on their ability to scratch or be scratched by other minerals.
for most parts i dont agree, Indonesian has standard grading test in all of area indonesia. this doesn't reflect the real ability and the interest of Indonesian student, So in my humble opinion the grading system must reflect personal ability of student, not generalize them
The Mohs scale of mineral hardness is used to determine the scratch resistance of minerals by ranking them from softest (1) to hardest (10) based on their ability to scratch or be scratched by another material. It is commonly used by geologists, mineralogists, and in fields like gemology to identify and classify minerals based on their hardness.
Aston Index is an ability test.
It distinguishes calciferous minerals from other minerals.
The tests indicate the best match of the tasks and responsibilities of jobs by the answers provided by test takers