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Natural, Dyed, Heated and Stabilized Gemstones Explained When shopping for gemstone beads, you may see descriptions such as natural, dyed, heated or stabilized. These terms describe whether a gemstone has been treated after it was mined. Gemstone treatments are common throughout the jewellery industry. Some improve colour, while others increase durability or make naturally porous material suitable for everyday jewellery. A treated gemstone is not necessarily fake or poor quality—it is simp …