Nice video. However, unless I missed it, you didn't get to the most obvious question of all! Why are ametrine crystals two colors, when the production of pretty much every other quartz mine anywhere in the world happily produces crystals of only one or no color?
No Brasil existem milhares de jazidas de pedras preciosas, porém não são devidamente exploradas por questões ambientais que impedem o avanço da economia do país. Lamentável!
The mine owners care about environment and don't discharge "sediments" when washing the gem gravel. Where is the dirty water going? In a reservoir? Lake? River? The dirty muddy water go somewhere.
What happens when it rains? The washed ruff that is tossed to the side gets wet when it rains. The groundwater leads to oceans, lakes, and rivers. Why not return the ruff to its original place where it is not polluting anywhere or harming anyone?
