Amethyst is a relatively hard mineral and does not scratch easily.
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Mohs Hardness Scale
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Amethyst is a type of quartz and has a hardness of 7 on the Mohs scale of mineral hardness. This means it can scratch materials with a lower hardness rating. For example, it can easily scratch calcite (hardness of 3), fluorite (hardness of 4), and apatite (hardness of 5).
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However, it can be scratched by substances with a higher hardness. Minerals such as topaz (hardness of 8), corundum (hardness of 9), and diamond (hardness of 10) are capable of scratching amethyst.
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In Daily Use
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In normal daily wear, such as when used in jewelry, amethyst is fairly durable. It can withstand the rigors of being worn regularly without significant scratching, provided it is not in contact with harder materials. For example, if an amethyst ring is worn on a finger, it is not likely to be scratched by normal contact with other objects.
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But it's important to note that if it is stored or worn with other harder gemstones or materials, there is a risk of scratching. Also, rough handling, such as dropping it on a hard surface or rubbing it against a sharp object with a higher hardness, can cause scratches.