In the latter case...

In the latter case, the hunter must be a Muslim; he must invoke Allah’s name while pulling the trigger; he must shoot with the purpose of hunting, and get to the place where the animal fell after it has died or when there was not enough time to slaughter it. Leather products made in non-Muslim countries from hides of snakes and crocodiles and displayed in non-Muslims markets are considered pure (tahir) ; and it is permissible to buy, sell, and use them in things that require purity.

Leather products made in Muslim countries and displayed in non-Muslim markets are considered pure (tahir) and it is permissible to use them in salat. Leather products made in non-Muslim countries whose nature and ritual purity cannot be determined, uncertain whether they are from natural or are permissible to use in salat. Shoes made from leather of an animal not slaughtered according to Islamic laws do not make the feet najis except through wetness that transfers the impurity.

So, if the foot sweats and the socks become soaked with the sweat, yet the latter does not reach the impure leather, it will not make the feet or the socks impure. It is permissible to say salat with a leather cap or a leather belt manufactured in non-Muslim countries and bought in non-Muslim markets if there is a probability that these leather products were made from hide of animals that are essentially halal and were slaughtered according to Islamic laws.

This has been mentioned in the third rule of this section. (See the question-answer section below.) Men are not allowed to wear gold regardless of whether it is a [normal] ring, a wedding ring, a wristwatch, or other things in salat as well as outside it. It is permissible for them to wear gold-plated items, provided that gold is only considered as a coating and nothing more. It is permissible for men to wear what is known as white gold.

Women are allowed to wear gold at all times, even in salat . Men are not allowed to wear pure and natural silk , neither in salat nor outside salat , except in special circumstances that have been explained in the books of Islamic jurisprudence. Women are allowed to wear silk at all times even in salat . Men are allowed to wear ‘doubtful’ silk fabrics and clothes whose origin doubtful, i.e. whether they are made from natural silk or synthetic one. In this case, even salat in them is permissible.