Can women wear gold mangala sutra instead of turmeric thread as married women these days and their mothers prefer to wear gold? Please clarify.

Turmeric thread is considered very auspicious. It is mentioned as ‘mangalyam tantu’ in the wedding shlokas. Swami Desikan said ‘mangalya sutram iva’.
Gold is also auspicious like turmeric thread, hence these days gold is preferred to that of turmeric.
But scriptures had instructed to wear turmeric thread so we cannot alter them to our convenience. Like how Yagnyopavitam is to men, mangala sutram is for women. Swami Desikan states it as Bibhrathi. One must wear it always in turmeric thread and not in gold.