Delicate stalactites, called soda straws, hang from the ceiling of the Painted Grotto in Carlsbad Caverns National Park, New Mexico. Soda straws develop where water droplets hang from the ceiling. Initially, a calcite ring forms on the ceiling. Calcite deposits continue to accumulate on the initial ring, and the straw grows longer as the deposits build up. If enough calcite deposits build up, the soda straws can develop into large stalactites. Calcite is a colorless mineral in its pure form. The presence of other minerals causes the stalactites in the cavern to take on yellow, orange, red, or brown coloration.
Add to Cart Add to Lightbox Download