sylvanite
/ˈsɪlvəˌnaɪt/
noun
- A mineral consisting of gold and silver telluride, often found in veins and valued as an ore of gold.
- Geologists identified the sample as sylvanite due to its silvery-white color and crystal structure.
- Sylvanite has a metallic luster and can contain significant amounts of gold.
- Miners discovered a rich vein of sylvanite in the old Colorado mine.