August Hollming, -Circular knot of gold brooch, centred by three cabochon sapphires issuing as buds from rose-cut diamond settings, St Petersburg, This brooch shows the influence of the Art Nouveau style in Russian jewellery.
JADE AND DIAMOND BROOCH. The carved jade ring decorated at either end with ribbon-like bands and lobed plaques set with a total of 92 old European-cut diamonds weighing approximately carats, the edges applied with black enamel, mounted in platinum.
A Russian diamond and gold brooch, Konstantin Linke, Bolin, St. Petersburg, 1899-1904 of interlaced infinity form, each aperture centered with a collet-set diamond, 56 standard, contained in original fitted case of Court Jeweler C.E. Bolin