An original emerald stone can be identified by observing its natural characteristics. Genuine emeralds usually have inclusions, known as jardin, which look like tiny cracks or mossy patterns—perfect clarity is rare. Check the color: a real emerald has a rich, deep green with slight bluish tones, not overly bright or dull. The stone should feel cool to the touch and may show slight color variations under light. Synthetic or fake emeralds often appear too flawless or glass-like. For confirmation, always ask for a certified gemstone report from a trusted gemological laboratory.