A diamond, sapphire, and emerald panther ring by Cartier. 18k gold set with diamonds and sapphires to create the panther's spots. Christie's description also says that the panther's head rotates, which is hard to imagine, but I'd love a chance to play with it. Via Diamonds in the Library.
Aquamarine diamond clip in yellow gold by Jean Schlumberger; c. 1965.
Cartier Panther Diamond Ring with Yellow Gold, Emerald and Onyx | From a unique collection of vintage cocktail rings at https://www.1stdibs.com/jewelry/rings/cocktail-rings/
A sapphire and emerald panther ring by Cartier. The ring is shaped like a gold panther that curls around the finger, holding a cabochon sapphire. The panther has an onyx nose and emerald eyes. Via Diamonds in the Library.
Platinum ring, the shoulders terminating in baguette cut diamonds supporting the bezel set with a square cut diamond and a ruby, Cartier c. 1950
Ruby and Diamond Ring, c.1950, by Cartier. Platinum ring