The Code of Ethics and Conduct sets out the professional standards and responsibilities expected of all Fellows and State Association members of the Gemmological Association of Australia (GAA). It is designed to ensure that the actions and conduct of members uphold the integrity, reputation, and trustworthiness of the Association, and that the interests of consumers and the public are treated with the highest priority.

The Code provides guidance on matters such as honesty in the representation of gemstones, impartiality in professional advice, confidentiality, and professional interactions with colleagues and the public. Compliance with the Code is mandatory, and breaches may result in the loss of membership, loss of Fellowship, or other legal action. Members are encouraged to familiarise themselves with the Code and apply its principles consistently in all gemmological practice.