Jardin is a technical term that refers to emerald. This noble gem of the beryl group is usually cloudy due to inclusions or fractures of the hairline. These imperfections are acceptable as long as they do not detract from the beautiful green color of the stone. In these cases, the lively play of colors caused by the inclusions is described as "jardin" – the French word for "garden" – and is regarded as evidence of the genuineness of the stone. In no other variety of precious stones are there imperfect and so rare specimens.