What is so special about a Stradivarius violin?

Related questions

1. Is violin harder than piano?
2. Who owns the real Red Violin?
3. Are all the Stradivarius violins accounted for?
4. Do violins sound better as they age?
5. Is it hard to learn violin?
6. Was there a real red violin?
7. Can Stradivarius play violin?
8. How much is a real Stradivarius violin worth?
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10. Why do guitars sound better as they age?

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17. #violins
18. #whose