Gold is not an "investment" - it satisfies the concept of true "money", has zero counterparty risk, is not a "debt-promise" but rather fulfilled in value as "pre-paid", and over the long-term, defies inflation.

The 4 types of green quartz:

1. Natural green quartz from the Montezuma mine
2. Heat-treated amethyst
3. Gamma irradiated quartz
4. Synthetic green quartz