Thank you so much Airgette and Baxter for your insights. I am intrigued. Queen Alexandra was photographed wearing what appear to be elements from her wedding gift necklace separately. I have no idea if what I have found matches anything either of you referred to, but clearly at least one other brooch does/did exist, (if not more). Here it would appear that several pearl and diamond elements from her wedding necklace are attached to a dark velvet band. http://www.npg.org.uk/collections/search/portraitLarge/mw132025/Queen-Alexandra-as-Mary-Queen-of-Scots?LinkID=mp00072&displayNo=60&wPage=2&role=sit&rNo=152 I would love to know more about other jewel elements she is wearing. Apart from an element from her wedding tiara and her Dagmar necklace most are unknown to me.