All the Princesses so far seen in the show have magical ability except for Entrapta. The Princesses that have magical powers like sparkles, lightning or ice get those powers from the naturally occurring magics of Etheria.
There appear to be fourteen Princesses currently on Etheria. Most are named as of Season Four. They are She-Ra (Adora and formely Mara), (Queen) Angella (whereabouts unknown), (Queen) Glimmer, Netossa, Spinnerella, Perfuma, Scorpia, Mermista, Frosta, Sweet Bee, the Star Sisters, Peekablue and one unnamed Princess.
Five princesses are leaders of a Kingdom. The Princesses with a kingdom are: (Queen) Glimmer, Mermista, Entrapta, Perfuma and Frosta.
When the Princesses, elemental or non-elemental, work cooperatively they produce aura generation which increases their power and causes them to glow. Entrapta seems to be the exception to this, but she has never been near the other Princesses when they had an aura generation.