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Look for flaws and examine the emerald or gem using a magnifying glass or jeweller’s lens, preferably through a 10x triple-lens. If you see small inclusions or irregular patterns within the gem, it is likely to be a true gem, although not necessarily an emerald. If the gem is quite transparent and has almost none of these “inclusions”, it may be a synthetic emerald, or it may not be a gem at all.
Gas bubbles only appear in natural emeralds near other inclusions of different shapes. If you only see a bubble crush, the gem is likely glass, but it could also be a synthetic emerald.
Examine the colour. Beryl mineral is only called emerald if it is dark green or teal. Greenish-yellow beryl is called a “heliodor,” and light green beryl is simply called green beryl. A greenish-yellow gem can also be an olive tree or a green garnet.
Look for wear on the facets. Glass and other weak materials wear out quickly. If the facet edges look smooth and curved, the gem is likely to be fake. Fake glass “gems” often develop an “orange peel” texture, with dimples and facets with slightly rounded edges. Look for these features with a slight increase.
Check the layers. Imitation “doublet” gems are constructed from two or three layers of different materials, often a green layer between two colourless stones. If the gem isn’t set, you can easily see those layers by submerging it in water and viewing it from the side. It is more difficult to see in a gem set, but you can try examining the area around the setting for unusual colour changes.
Take special care with cheap prices. If the offer sounds too good to be true, trust your instincts. A natural vivid green emerald with a brilliant shine generally costs at least $ 500 to $ 6000 per carat. If the price seems suspiciously low, it is likely glass or crystal, not emeralds.
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