Queen Mary reportedly gave the parure to the Queen Mother, but it was later sold at auction. It is wrong and wrong
The truth : Queen Mary gave the parure (certainly in her will) to Princess Margaret in 1953. (Certainly she wanted her granddaughter having a parure like her daughters-in-law.)
Princess Margaret appeared to have no affection for this stone as she had never worn it in public.
Princess Margaret sold this parure in 1982 (she need money...).
A man posted photos of this parure worn by his former wife on a public blog. I have sent him a private message. He kindly answsered me. I asked him many questions and He answered me . He also sent me private photos of his wife wearing the very beautiful parure !
As Beth has written I find also interesting that Queen Mary never gave the amethysts to any of her daughters-in-law ; she kept the jewels and continued to wear them. If she had a special affection to this stone she could have bequeathed it to QEII in order to this parure remain in the main branch.
From the sell :
"Part of the parure:
1. an Amethyst Tiara, circa 1815, of Empire style, the tapered band set with cushion-shaped amethyst bordered by similarly shaped diamonds, later fittings and several repairs;The tiara includes large oval amethysts positioned vertically between sets of two horizontally stacked smaller oval amethysts. The whole diadem is studded with extra diamonds and is enclosed by a straight row of diamonds at the top and bottom. Though rounded gems of any sort surrounded by diamonds is an old concept like an kokoshnik.
2. an Amethyst Necklace, circa 1815, designed as a row of ten oval amethysts graduated in size from the front and each bordered by cushion-shaped diamonds and connected by diamond quatrefoil motifs, the front supporting detachable pear-shaped amethyst drops, four of which are briolette, all of the clusters are detachable;
3. an pair of Earrings with Amethyst and Diamonds of similar design, early 19th Century;
4. An Amethyst and Diamond Ring, last quarter of the 19th Century, slightly imperfect""
From Royal Magazin :
"The suite was sold in Geneva in 1993 for £55,357 but it is not known who the seller was. Later that year the suite appeared on view at the London Grosvenor House Antiques Fair for sale at £150,000."
In recent years, Vogue editor Anna Wintour has been photographed wearing the necklace from the set.