A group of four hardstone egg pendants

comprising: a jewelled bowenite egg, Frederick Koechli, St Petersburg, 1899-1908, the shoulders overlaid with gold cage set with diamonds and cabochon rubies, 56 standard; a lapis lazuli example, illegible workmaster's initials, St Petersburg, circa 1890, gold suspension ring, 56 standard; a gold-mounted amethyst egg, illegible workmaster's initials, set with a sapphire and turquoise, 56 standard; and a silver-mounted milky white hardstone egg, 78 standard