As indicated by the caption, this image from 1900 shows Katherine Alexandra Duer Mackay (US1797spouse1) wearing a diamond dog collar with detachable pendant diamonds and wearing a diamond and turquoise tiara on top of her pompadour.
The caption accompanying this image reads:
Katherine Mackay's diamond dog collar was a wedding gift from her husband's mother. It included pendant diamonds that were detachable. Atop her pompadour, she wears a diamond and turquoise tiara.
This image is a crop from another image of Katherine holding and wearing orchids. Another crop from that same image shows her diamond and emerald necklace draped across the bodice of her dress. A third crop from that image shows a close-up view of that diamond and emerald necklace draped across the bodice of her dress.
See Harbor Hill, Clarence Hungerford Mackay's Mansion.
