Lodestone is magnetic. How might you identify whether a mineral sample might be lodestone?
Take a magnet and see if the mineral is attracted to and repelled by the magnet.
Non-magnetic iron ores will be drawn to a magnet's magnetic field; only another magnetic material will be repelled if the two poles of the magnet are the same (north, north) or (south, south). All magnetic materials have two poles.
A sample of mineral is magnetic if it exhibits both attraction and repulsion to a magnetic.
Although lodestone isn't a guarantee if the sample passes both of these tests, some types of cobalt and nickel also act as natural magnets.
To confirm that the sample is lodestone, additional testing such as the density and streak tests would be necessary.
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You can identify whether a mineral sample might be lodestone by using a magnet. Lodestone is naturally magnetic, so if a mineral sample is attracted to a magnet, there is a good chance it is lodestone. Additionally, lodestone is typically a dark gray or black color and often has a metallic luster.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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