Teck Turquoise Jewels given to Princess Alice, Duchess of Gloucester as wedding presents.
The diamond fringe with Turquoises and pearls are also from Queen Mary, and probably the earlier part of the diamond resille necklace.
Queen Mary wore it in this style, the picture above, of the Duchess of Gloucester, is taken in 1953.
Duchess Birgitte of Gloucester was seen in public wearing this necklace in the 1990th.