Is it permissible to adorn swords with precious stones?

Adorning a sword with gemstones other than gold and silver is permissible. The general principle regarding customs is that they are not forbidden unless there is a specific religious text prohibiting them. There is no prohibition mentioned concerning a sword adorned with gemstones. It is permissible to use utensils and precious jewels that surpass the value of gold and silver, as long as this is not accompanied by ostentation or arrogance.