Asked by: Gemma Malveira
hobbies and interests jewelry making

Can calcite scratch glass?

Last Updated: 23rd February, 2020

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Quartz (hardness 7) is harder than glass (5.5),soit will scratch the glass. With a hardness of3,calcite is softer than glass (5.5), so itdoesnot leave a scratch. The penny and thecalcite havethe same hardness.

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Also to know is, what can scratch calcite?

The hardest mineral known, diamond, was assignedthenumber 10. The Mohs Hardness Scale ranks the order of hardnessofminerals and some common objects. For example, yourfingernailcan scratch the minerals talc and gypsum, with ahardness of2 or lower. A copper penny can scratch calcite,gypsum, andtalc.

Likewise, can nails scratch glass? So there's no way fingernail can scratchglass,but sand can because sand contains tiny quartzparticleswhich is above glass hardness.

Regarding this, what will scratch glass?

Hardened steel, such as a file, can scratchglass.Titanium, chromium and even sapphires or rubies canscratchglass, while aluminum or a butter knife blademaynot.

How hard does a mineral have to be to scratch glass?

Proceeding with the glass plate, themineralis unable to scratch the glass(hardness = 5.5)at all. This mineral is about 4.0 on theMohs scale. (If amineral indeed scratches glass, youwill beunable to wipe the scratch away.)

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Scratch Test
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