Praise be to Allah, the Lord of the Worlds; and may His blessings and peace be upon our Prophet Muhammad and upon all his Family and Companions.
Wearing jewelry while praying is lawful as there is nothing that proves the opposite. But you should know that it is unlawful to expose one's jewelry to alien men during or outside prayer. The woman should also, while walking to the mosque, beware of letting her screened jewelry make noise.
Allah Says (interpretation of meaning): {…. And let them not stamp their feet so as to reveal what they hide of their adornment….}[24:31].
Allah knows best.