1960s Cartier Lapis Ruby Sapphire Turtle Brooch

An 18 karat yellow gold, lapis lazuli, ruby and sapphire brooch, Cartier, Paris, circa 1965.  Designed as a turtle, its shell formed by numerous lapis lazuli discs, each disc applied with a bezel set round faceted ruby, the eyes formed by two round cabochon sapphires.  Length approximately 1 1/2 inches.  Gross weight approximately 13.60 grams.  Signed and numbered.