An Art Deco diamond and rock crystal brooch, Lacloche Frères, French, circa 1920. Designed as a carved rock crystal plaque, enhanced by pierced and openwork pavé-set diamond detail, centring an old-cut diamond; signed Lacloche Frères, Paris, with fitted box; mounted in platinum. Art Deco, Bijoux, Art Deco Jewelry, Antique Jewelry, Antique Art Deco Jewelry, Vintage Jewelry, Fine Jewelry, Vintage Jewels, Jewelery