These statements are statements of kufr. If he didn’t mean it, he has committed a minor kufr.
Read moreIt 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
Read moreWa 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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