A dead spot is an area of the gem in which no play-of-color appears and only background color is visible. Dead spots detract from opal value, especially if there are several of them. With an opal, ...
We sell different types of products and services to both investment professionals and individual investors. These products and services are usually sold through license agreements or subscriptions ...
We sell different types of products and services to both investment professionals and individual investors. These products and services are usually sold through license agreements or subscriptions ...