Using the materials provided, determine the hardness of the mineral provided. Explain your reasoning.
Between 3 and 5.5 because it scratched the copper plate so it must be harder than 3, but it didn't scratch the glass, so it is not as hard as 5.5
Eve found a cool mineral after the rainstorm. She conducted some tests on its properties and came up with the following data. Using her data and the known data for the given minerals, what mineral do you think Eve's stone is made up of? Explain your reasoning using her data as your evidence.
I think that Eve found fluorite because her mineral was glassy and only acrylic, fluorite, and glass have a luster of glassy. Also, her mineral was harder than copper just like fluorite and glass are harder than copper. Lastly, her mineral was softer than glass. Glass is not softer than glass, so the only mineral softer than glass yet harder than copper is fluorite.