These are "ice leaves" but the overall underwater cave atmosphere could still be used as a good reference. Swap out the ice leaves with shiny crystals.
Fire and Ice by michaelanderson on deviantART Laguna Torre, Los Glaciares National Park, Patagonia, Argentina. A fiery sunset illuminates Cerro Torre and the cold icebergs of Laguna Torre, one of the most beautiful lakes in all of Patagonia.