Quote Originally Posted by ergray View Post
A few weeks ago I was with German, the owner of Yucatech expeditions in Cozumel and he told me about the caves in Cuba, apparently they have a very similar Geological structure a the Cenotes that we have here, but with a lot of quartz in them, reflecting the light in an amazing way, I'll try to go next year.

Contact German, he was exploring and training guides there, I'm sure that he will give you all the insights, http://www.yucatech.net/contactus.htm

A lot of americans fly through Cancun, is very cheap and there are like 3 flights a day to la Habana.

If you get to dive there don't forget to post some pics.

Hope this helps, cheers,

Ernesto.
That sounds kind of weird that their would be any sort of quarts in a lime stone cave. Quartz is igneous in nature while limestone is a sedimentary rock. I bet that who ever made that observation had mistaken it for Dogtooth spar a calcite crystal which is common in caves. Or the other possible canidate would be argonite a polymorph of Calcite caused by Magnesium poisening it is other wise meta stable at surface pressue temprature gradients. It sounds like the Glory hole cave but flooded.