The Delhi Durbar Tiara - by Garrards, for Queen Mary for the Delhi Durbar on December 12,1911. Durbar is Hindi, for a ‘ceremonial gathering to pay homage’. The gathering was to install King George V and Queen Mary as Emperor and Empress of India. King George V admired this piece and referred to it as “May’s best tiara”. It has been worn in a variety of ways as shown here.
The five point chain attachment is an idea to use on pendant. This is not contemporary - image from a gallery of vintage and/or antique objects. MURRLE BENNETT & Co Art Nouveau Necklace Gold Amethyst Peridot