مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٥٣ - THINGS ON WHICH TAYAMMUM MAY BE PERFORMED

on anything else. In case earth is not available it should be performed on sand or a lump of clay and in the absence of that on a stone.
٦٩٣. It is in order to perform tayammum on gypsum or limestone. On the basis of obligatory precaution, however, tayammum should not be performed, without proper excuse, on baked gypsum or lime or baked bricks or mineral stones like agate-stone (Aqiq)
٦٩٤. If it is not possible for a person to procure earth, sand, lump oi clay or stone, he should perform tayammum on the dust which may have settled on a carpet or dress. And in case even dust is not available he should per~orm tayommum on wet earth. And in both the cases the obligatory precaution is that, ii possible, he should also perform tayammum on the things mentioned above (gypsum, lime, brick and mineral stone). And ii even dust and earth are not available he should perform tayammum on anyone of the said things. And if none of these things is available he should, on the basis of recommended precaution, offer prayers without performing tayommum, and it is obligatory that he should also resffer the prayers.
٦٩٥. If a person can procure clay by shaking carpet etc. performance of tayammum by him on dust is void. And similarly if he can make mud dry and procure clay from it performance of tayammum by him on wet mud is void.
٦٩٦. If a person, who does not have water, possesses snow or ice he should, if possible, melt it into water and should perform. ablutions and take bath with it. And if it is not possible to do so and he does not also have anything on which performance of tayammum may be valid it is necessary that he should offer (Qaza) prayers after its prescribed time. And it is better that he should make the limbs of ablutions or bath wet with the snow or ice. And if even this is not possible he should perform tayammum on the snow or ice and should also offer prayers in time.