First items 1st, keep it clean. A gentle, moist cloth gently wiped above your Pukhraj can get rid of any Filth or grime that might have settled on its surface. Stay away from severe substances or abrasive elements; they may be also difficult on your own stone. Recognize: Undefined variable: https://www.apsense.com/article/810029-some-historical-facts-about-sri-lankan-yellow-sapp.html