Calling the dead is shirk! Seeking the assistance in things that humans can do is. It shirk. Fr example, if you ask someone to help you carry a big box, this is permissible. But if you ask him for example to restore your eyesight and he is not a doctor, this is shirk!

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You must burn them completely while reciting Ayat Al Kursi on it and the last 3 surah of the Quran.

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You should inform your family the best that you can do that this is haram and it nullifies Islam. Your father is allowed to take a second wife !

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It is permissible to wear them without any belief in them! To believe that these gem stones have properties and can help you or harm you in anyway, it is Shirk, minor or major! I advice you to read the below link: http://islamqa.info/en/6759

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Wa alaikum salaam, I don’t give references due to lack of time, however, this is shirk and may nullify Islam to believe that dust will heal! Allah is the All Healer and not some dust from so called saints or peers.

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