Metalic deposits in slate?
Metalic deposits in slate?
Hi everyone,
Ive recently bought some slate floor tiles from my local hardware store with the intension to smash it up and make small caves for my l46 but when I got it home I noticed a metalic finish to the tiles .Its natural slate with very very small reflective bits almost like a light sprinkling of very fine glitter and what looks like a few small rust spots.Does anybody think it will be safe to use?
Ive recently bought some slate floor tiles from my local hardware store with the intension to smash it up and make small caves for my l46 but when I got it home I noticed a metalic finish to the tiles .Its natural slate with very very small reflective bits almost like a light sprinkling of very fine glitter and what looks like a few small rust spots.Does anybody think it will be safe to use?
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These "metallic" deposits are most likely Mica and Quartz grains which can be found in most sedimentary rocks like slate, sandstone and mudstone.
Quartz is resistant to chemical attack so wont dissolve easily in the water.
Mica and Feldspar are less stable and contain mettalic ions which conect there structures. Chemical weathering can remove these ions causing them to break down.
In high temperatures with acidic water these minerals can break down much more quickly. However, they are very small quantities, and the process is relatively slow.
Rain water for example breaks down these minerals and has a typical ph of app 5.6.
Quartz is resistant to chemical attack so wont dissolve easily in the water.
Mica and Feldspar are less stable and contain mettalic ions which conect there structures. Chemical weathering can remove these ions causing them to break down.
In high temperatures with acidic water these minerals can break down much more quickly. However, they are very small quantities, and the process is relatively slow.
Rain water for example breaks down these minerals and has a typical ph of app 5.6.