A transparent emerald without any black dots is considered to be of a very high quality and is accordingly very costly, if you find such a specimen on sale at a cheap price then chances are that it is a duplicate. Please always test your Emerald’s quality from a Gem Lab as incidents of duplication are very common.
If Mercury is in an auspicious and beneficial position in your horoscope, you should usually wear an Emerald. The Mind of the wearer is said to function optimally and afford benefits especially in study, business and writings. Students are usually advised to wear an Emerald after due analysis of their horoscopes by an experienced Astrologer towards improving their concentration in studies. A Good education depends on the planet Mercury.
If you are a business man and aim for success you can wear an Emerald as Mercury also represents the business activities in someone’s life. If your aim is to become an actor or a model it would be quite beneficial to have a strongly placed and powerful Mercury in your horoscope which would be helped greatly by wearing an Emerald.