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.
Because they look alike
No it does not work with all minerals. For if you did not know streak plates have a hardness of 7 (maybe a little lower or higher) on the Mohs scale. Some minerals are harder than 7 though. If they are harder they will not work with the streak test. some examples are Diamond, topaz, and corundum.
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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
Aston Index is an ability test.
Hardness test for minerals
The tests indicate the best match of the tasks and responsibilities of jobs by the answers provided by test takers
go to google and type in inelligence test and it will show you.add But before you get bogged down in a plethora of some quite narrow test instruments, reflect that a good measure of intelligence is the ability to solve new problems and challenges.
Some students might be very bright and have the ability to do well in a job or at college but, for various reasons, might not have received the highest grades. They might have high test scores but low grades or vice versa.
It distinguishes calciferous minerals from other minerals.
streak test, hardness test, scratch test, color test