Please forgive me if these have already been discussed. In the publication Ancient and Modern Gems in the Collection of Her Majesty the Queen i saw this interesting suite of antique jewels acquired by Queen Mary. The pieces can be viewed on the UK Royal Collection website. Here below is information from the book and links to view the individual items.
I am curious to know from whom did Queen Mary acquire these jewels. Thanks

Ruby parure with Cameos.
Parure: Turin 1824 - 9 [Brooch mid-nineteenth century]
Cameos: North Italian, sixteenth-seventeenth century.
Onyx: White on translucent gray: Gold & Burmese rubies.
Provenance: Acquired by Queen Mary in 1932

Royal collection ruby cameo parure RCIN 4187
https://www.rct.uk/collection/4187/earrings-from-a-ruby-parure-with-cameos

Royal collection ruby cameo parure RCIN 4188
https://www.rct.uk/collection/4188/brooch-from-a-ruby-parure-with-cameos

Royal collection ruby cameo parure RCIN 4189
https://www.rct.uk/collection/4189/cruciform-brooch-from-a-ruby-parure-with-cameos

Royal collection ruby cameo parure RCIN 4190
https://www.rct.uk/collection/4190/necklace-from-a-parure-with-cameos

Royal collection ruby cameo parure RCIN 4191
https://www.rct.uk/collection/4191/bracelet-from-a-parure-with-cameos