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Scoria, is a poor-quality glassy substance formed in volcanoes. It commonly has many gas vesicles in it, and is usually red to black in colour. Unlike its cousin Pumice, scoria has a density greater than 1, hence it will sink in water.
As to melting point, like most complex mixtures it does not have a simple melting point, rather a softening point, and this will be in the high hundreds of deg C.
Wiki User
∙ 13y ago
Wiki User
∙ 12y agoScoria's hardness is 6-6.5
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What is a sentence with the word hardness?
no one likes your Hardness! hardness is not a good character.
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The hardness of Limonite is 4 t0 5.5 on the mohs hardness scale.
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it has to do with the hardness of the mineral which can be found by moh's scale of hardness
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Pure materials, especially minerals, are measured on a hardness scale. There are three basic tests: indentation hardness, scratch hardness and rebound hardness. See Wikipedia
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what is the difference between Shore-A Hardness & Barcol Hardness
What is a sentence with the word hardness?
no one likes your Hardness! hardness is not a good character.
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it has to do with the hardness of the mineral which can be found by moh's scale of hardness
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