In my opinion, this example is okay. I take the "their symmetries embellished" phrase/clause as parenthetical, or an appositive. ) and [are] in a new style.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
pokh whose murals are brilliantly colored, their geometrical symmetries embellished with old and new iconography and in a style that varies from woman to woman and house to house.
pokh If it were an appositive, should the sentence not be as follows:
whose murals , their geometrical symmetries embellished with old and new iconograph