Oxidizing copper or silver with liver of sulfur

I’ve made a video on how to oxidize, or apply patina, to copper or silver. The chemical compound used in this video is potassium sulfide, also known as liver of sulfur. In its natural state it’s a solid, like little crumbly pebbles, that can be dissolved in hot water. It’s also sold already in liquid …

Mohs Scale – hardness scale for minerals, metals and other materials

When you work with minerals you notice there’s a difference in hardness between gemstones. As a jeweller you must know which gemstones are resistance to damage, both during the creation process and afterwards, while wearing the piece. For example, while setting a topaz you can file away the ends of the claws without damaging the …