There are certainly 100% natural gemstone beads and cabochons available, but there are also many imitations, manmade, dyed, or altered stones as well. Manmade gemstones are beautiful, and a great addition to any piece of jewelry, they just aren't natural. Some gemstones require different or more involved tests than the teeth test to determine whether they are real or fake. Such tests can be found with a simple Google search. To test amber, see if it floats in water. Real amber will float, fakes will sink. In the gemstone world there are gemstones that have been created to either mimic nature or to try and look like nature. These gemstones are called Synthetic, imitation or simulants. A bead is a small decorative piece that is used for creating necklaces, bracelets and an assortment of decorative gowns/ attire. They can be found in a multitude of sizes (1mm- 1cm) and have adorned the human body for thousands of years as jewelry – the oldest dating back 100,000 years.