AGTA - American Gem Trade Association
AGS - American Gem Society
AMMONIA - A colorless, pungent gas used to manufacture a wide variety of nitrogen-containing organic and inorganic chemicals.
ANNIVERSARY - The annually recurring date of a past event, especially one of historical, national, or personal importance: a wedding anniversary.
ASTROLOGY - The study of the positions and aspects of celestial bodies in the belief that they have an influence on the course of natural earthly occurrences and human affairs.
AYURVEDIC - The ancient Hindu science of health and medicine.
