First items very first, continue to keep it clean. A comfortable, moist fabric gently wiped more than your Pukhraj can remove any Dust or grime That may have settled on its surface area. Keep away from harsh chemical substances or abrasive products; they are often too difficult with your stone. https://www.apsense.com/article/810029-some-historical-facts-about-sri-lankan-yellow-sapp.html