luster
In 1822 scientist Friedrich Mohs developed a scale to measure the hardness of minerals. A mineral will scratch other minerals softer than itself and will be scratched by minerals that are harder.
get a mineral tester and find it cheap. some rip you off
Mineralogists often use the physical properties of minerals to identify them. The most reliable test in order to identify a mineral is the test for hardness.
A streak test is performed to identify minerals by observing the color of their powdered form. This is achieved by rubbing the mineral against a porcelain streak plate, leaving a streak of powder that can reveal the true color of the mineral, which may differ from its appearance in crystal form. The test is particularly useful for distinguishing between minerals with similar physical characteristics. Additionally, it helps in the identification process as some minerals have unique streak colors.
The streak test is used to identify minerals by examining the color of the mineral’s powder when it is scraped across a hard surface, typically a porcelain plate. This test reveals the true color of the mineral in powdered form, which can be more consistent than the color of the mineral itself, as some minerals can exhibit a range of colors due to impurities. The streak color can provide valuable clues that help differentiate between similar-looking minerals. Overall, it is a simple yet effective method for mineral identification.
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.
With the Mohs hardness test, with magnets, with reactions to acids, with spectrometers, with visual inspection, with streak tests, with reaction to hammer blows, with scales to measure density, with ultraviolet light, with electrical equipment, and with feel and taste.