Usually the mineral deposits a certain color or colors that you wouldn't see otherwise.
The answer will depend on the mineral. Some minerals, such as talc, are extremely soft and will not mark the tile.
colour?
ive got no idea that is y i came here stupid thing
You're testing it's hardness.
What you are referring to is called a streak test. It's used as an aid to mineral identification. As a mineral is drawn over the unglazed tile surface, it is reduced to a streak of dust which reveals the true color of the mineral. If no color is revealed, the streak color is called white. An amethyst crystal which appears purplish will actually have a white streak, because the streak color of the constituent quartz is white. The purplish color of amethyst is due to other reasons.
When a mineral scratches a porcelain tile, it leaves a mark that can appear as a streak or a line on the surface of the tile. This mark is typically indicative of the mineral's hardness, which can be assessed using the Mohs hardness scale. The scratch may vary in depth and visibility depending on the hardness of the mineral compared to the porcelain. Porcelain tiles are generally quite hard, so only harder minerals will leave a noticeable scratch.
Mineral streak is the color of the powder produced when a mineral is scratched on a porcelain streak plate. It is a useful property for identifying minerals, as different minerals can leave distinctively colored streaks.
You can try Biodex 300 if the mineral deposit is just a film (CAUTION IT'S DANGEROUS). If it is thicker you can try a pumice stone (CAUTION MAY SCRATCH TILE). You can hire someone to blast with glasss beads (IT WILL DAMAGE THE TILE), or to dry ice blast (IT IS NOT LIKELY TO DAMAGE THE TIME). You can contract someone to clean with natural mineral salts (SAFE) To find someone who uses mineral salts, search on the internet for "pool tile cleaning magnesium sulfate".
Properly. NO! The correct way to do it would be to rip out the tile and start from scratch with a new subfloor for the sheet vinyl to be installed on.
to find the minerals streak, what i the mineral rubbed in
When you rub a mineral on a tile it is called streaking a mineral. The line that is left is called the streak, and the tile itself is called a streaking plate.
The streak of a mineral can be determined by rubbing the mineral against an unglazed porcelain tile to produce a powder. The color of the powder left behind is the streak color of the mineral. It is important to use a streak plate or tile with a hardness greater than the mineral being tested to prevent contamination.