MERCURY AND ITS NATURE
In the first place, this planet indicates education, letters, disputation, reasoning, brotherhood, interpretation, embassies. It is about number, accounts, geometry, markets, youth, games, theft, association, communication, service. It also indicates gain, discoveries, obedience, sport, wrestling. Moreover, it stands for declamation, certification, supervision, weighing and measuring, the testing of coinage, hearing, versatility.
V. Valens
SYMPTOMS OF POORLY PLACED MERCURY IN THE CHART
When Mercury afflicts or poorly places in the astrological chart, the native will have communication, speech, learning problems, issues with reasoning, interpretation as well as business difficulties.
THE GEMSTONE OF THI PLANET IS: EMERALD

THE BENEFITS OF THE MERCURIAN GEMSTONE
Better communication, oratory, mental and intellectual skills, better mental reasoning and processing, improved business gain and growth opportunities.