Ethiopian Opal Types and Varieties
Ethiopian Opal was discovered in 1990 but was first commercially mined until 2008. I remember when you could find small batches of these opals at the Tucson Gem and Mineral show in the mid-90s. Some gemstone dealers were trying to pass them off as Australian opals while others were upfront with where they came from […]
Types and Varieties of Slag Glass
Slag or slag glass is fairly common in the rock and mineral world, believe it or not. Most rock shops will have a bucket or two of this material and it will always catch your eye because the colors and patterns are vivid in nature. I get lots of subscribers to my newsletter emailing me […]