In some minerals color is directly related to a metallic element, is characteristic, and can be useful in identification. As examples,  azurite as shown in Figure 1A, is always blue. . . Read More

Tales of the discovery and loss of rich gold mines such as The Lost Dutchman in the Superstition Mountains of Arizona and the El Naranjal lost gold mine in the. . . Read More

Having greatly enjoyed researching and writing about ancient and recent jewelry in my blog on Garnets (Glorious Garnets) and on silver jewelry in Silver II, I decided to present in. . . Read More

This is the first of two Blogs on native gold. In the first I introduce the mineral and its properties, including a gallery of specimens exhibiting the crystal forms of. . . Read More