I'm not sure what you mean by "cristal" - try "crystal"-caves, all lower-case.
There a few caves dotted around the world that have been given the proper-noun, "Crystal Cave". A very quick internet look showed a "Crystal Caves" (pl) in Mexico, and in the singular, one in the USA and one in England. I daresay there are others, and the name presumably reflects them being rich incalcite formations.
They don't exist as a cave genera: caves are classified by the way they form but there is no "crystal cave" class.
They can use a kind of glass/cristal named Prisma
Stalac"tites", top, or on the roof of the cave. Stalagmites form on the floor of caves.
In caves formed in limestone - as are most of the world's caves although not all such caves contain stalagmites and stalactites. They are precipitations of calcite dissolved from the host limestone by carbonic acid - rain water acidified by atmospheric carbon dioxide dissolved in it.
Sedimentary rock
Caves are usually natural formations (although some are man made) which bury deep into rock. Windows are man-made objects.
one has no ears
cristal or en cristal - for 'in cristal'
The Jenolan Caves in Australia are a significant limestone cave system and the oldest discovered open caves in the world. The caves are around 340 million years old and offer a unique underground experience with a variety of formations including stalactites and stalagmites. They are also home to an array of rare and endemic species.
Cristal Camden's birth name is Cristal Cichowski.
in a mine or caves
That is not cristal. It is cristae, innerfoldings
Cristal Steverson's birth name is Cristal Athena Steverson.
cristal means beautiful girl
That is cristae ,not cristal. They are inner foldings
What is a cristal sweeper
he is boycotting cristal because the president of cristal said that he views rappers, rapping about cristal as a negative light put on the company.
in a mine or caves