nickel
Copper sulfide minerals, such as chalcocite and bornite, can be scratched by a penny but not a fingernail. This is due to the Mohs hardness scale, where these minerals have a hardness greater than a penny (3.5) but less than a fingernail (2.5).
A penny would scratch minerals with a lower hardness rating such as calcite, gypsum, or talc. Minerals like quartz or topaz would not be scratched by a penny because they are harder than the metal in a penny.
no
science
The mineral that can be scratched by a penny is talc. Talc is the softest mineral on the Mohs scale, with a hardness of 1. A penny has a hardness of around 3.5 on the Mohs scale.
No, calcite is harder than a penny and cannot be scratched by it. Calcite has a Mohs hardness of 3, while a penny typically has a hardness of around 3.5 on the Mohs scale.
Topaz,Calcite Cooprarte
Minerals that have a hardness less than that of a knife blade (5.5 on the Mohs scale) can be scratched with a knife. These minerals include gypsum, calcite, and talc.
The mineral that can be scratched by glass but not a penny is calcite. Calcite has a hardness of 3 on the Mohs scale, which is lower than the hardness of glass (5.5) but higher than that of a penny (2.5).
Minerals that can be scratched by a knife typically have a Mohs hardness of less than 5.5. Common examples include talc, gypsum, and calcite, which are softer minerals. A knife, generally made of hardened steel, can scratch these softer minerals, while harder minerals like quartz or diamond cannot be scratched by a knife.
Oh, dude, like, a copper coin can totally scratch minerals with a hardness of 3 or lower on the Mohs scale. So, you know, minerals like calcite, gypsum, and talc better watch out for that shiny penny! But, like, don't go around scratching random rocks with your spare change, okay?
apatite with a steel knife feldspar with window glass