Re: how dogypsum crystals grow so big?
Well Gypsum crystal can grow at very low temperatures from a concetrated solution of the parent mineral. As long as there is a large enough opening, in this case the mines in Naica Mexico containing huge natural pocket openings, and the solution is present long enough crytals can continue to grow. Ask "Google" about giant crystals and u will be surpised what nature can make. When I was in Saudi Arabia we had layers of the crystals that were two to three feet thick and covered acres of area. All it took was the rising and falling water table in a part of the desert rich in Gypsum and the crystals got larger with each rainy season cycle. Same thing at Naica just a lot longer, and bigger open pocket area in the caves.
From Don Mello - October 10, 2007 at 14:06:35