Synthetic Stones Synthetic gemstones are made in laboratories or factories,not in rocks.They have virtually the same chemical composition and crystal structure as natural gemstones,so their optical and physical properties are very similar. however they can usually be identified by the differences in their inclusions. Because of the way they are made ,synthetic gems may show subtle differences in shape and color that help to distinguish them from their natural counterparts.They have different inclusions from natural gems,so often the best way to tell them apart is to examine them with a microscope. Synthetic Crystals Synthetic Faceted Emerald

Imitation Stones Imitation gems have the appearance of their natural counterparts,but their physical properties are different.They are made to deceive.Man-made materials ,such as glass and synthetic spinel have been used to imitate many different gems,but natural stones can also be modified to resemble more valuable gems.It is possible to enhance authentic gemstones by hiding cracks and flaws,or by heat-treating or irradiating to improve their color.