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It depends. Opals range between 5.5 and 6.5 on the Mohs hardness scale (how easy it is to scratch) which is kind of soft, so when used in jewelry they are usually coated with a polymer that provides a thin layer of protection against every day wear and tear.
Now, when you say "nail" do you mean finger nail (hardness 2.2-2.5, NO) or a metal nail you hammer? And if a metal nail, made of what metal? See, iron, nickel, and carbon steel are only around a hardness of 4-5 (won't scratch an opal), but some nails are made out of hardened steel which at 7.5-8 WILL scratch an uncoated opal.
What else can I help you with?
Can magnetite be scratched by finger nail?
Yes, magnetite is harder than a fingernail and cannot be easily scratched with it. Magnetite has a Mohs hardness of 6, while a fingernail typically has a hardness of around 2.5.
What hardness does a mineral have if it scratched by glass but scratched an iron nail?
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
Can magnetite scratch other rocks and minerals?
Yes magnatite does and it can be scratched by a nail Jk!
What rock is soft enough to be scratched by a nail?
Rocks that mostly contain minerals like mica, gypsum, and talc can be scratched by a fingernail.
What hardness does a mineral have if it is scratched by glass but scratches an iron nail?
It would have to be 5.0 because glass has a hardness of 5.5 and an iron nail has the hardness of 4.5
Is there nail polish grinned into opal?
yes
Can lead be scratched by a nail?
Yes.
Which mineral can be scratched by a steel nail?
Calcite is a mineral that can be easily scratched by a steel nail due to its relatively low hardness compared to steel.
Can sulfur get scratched by a nail?
No, sulfur is harder than a nail so it cannot be scratched by a nail. Nails are typically made of iron, which is softer than sulfur. Therefore, if a nail comes into contact with sulfur, the nail is more likely to scratch than the sulfur.
Can halite be scratched by a nail?
Halite has a hardness of 2.5 on the Mohs scale, while a fingernail has a hardness of about 2.5 as well. Therefore, halite can be scratched by a nail.
Can hematite be scratched by a nail?
It can be scratched by a diamond, corundum, topaz, and quartz.
Can feldspar be scratched by a nail?
Yes. It is much harder than your fingernail.
Can diamonds be scratched with a nail?
No. Only another diamond can scratch a diamond.
Can nickel be scratched by a nail?
Yes, nickel is softer than steel, so it is possible for a nail to scratch nickel.
Can fluorite be scratched by a steel nail?
Yes. A steel nail has a Mohs hardness greater than that of fluorite.
Can sulfur be scratched by a nail?
No, sulfur cannot be easily scratched by a nail because it is a relatively soft material compared to metals like iron or steel. Sulfur has a Mohs hardness of 1.5–2, while iron nails typically have a hardness of 4-5 on the Mohs scale.
Can talc be scratched by a steel nail?
Yes, because talc is very soft.
