Pearl necklace with gemstone set centerpiece,

Necklace made of white akoya cultured pearls, d.: approx. 6.5 - 7 mm, very nice luster, center element set with pink faceted tourmaline, opal and diamonds in different cuts, totalling approx. 0.30 ct, good colour and clarity, 18K YG, 45.0 g, l.: 58 cm, 20th/21st century, tourmalin clearly abraded.