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- Beauty The foremost requirement of jewelry is beauty.
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- Rarity If there is a large amount, anyone can easily own it, so it is not worthty as a jewel.
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- Robustness It should be hard and tough to be robust.
Hardness is the ability to withstand wear and tear and toughness is the ability to withstand shocks.
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- Tradition In order to be valued as jewelry, it should have been favored by many for a long time.
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- Portability Jewelry should be a size that can be carried easily. If you can’t set it in a form that you can carry on your body such as a ring or a necklace, it won’t be able to fulfill its role as an ornament.