Gouffre de Cabrespine

Esperansa, on January 26, said:

Are these stalactites?

Jan Pereboom, on January 27, said:

These are indeed formations found in many stalactite caves. But they grow slightly different as compared to stalactites and stalacmites. The are called "cave flowers", and the name is aragonite or anthotide. You can find some information on wikipedia. Jan Pereboom