Cultured pearl, tanzanite, aquamarine and yellow gold necklace

Centering (1) 20k yellow gold filigree pendant, (marked 22KDN, 916), measuring approximately 25.0 X 15.0 X 3.8 mm, suspended from a twisted triple strand of freshwater cultured pearls, measuring approximately 3.0 X 2.0 mm, interspaced by faceted tanzanite and aquamarine beads, measuring approximately 5.0 X 4.0 mm, completed by a 20k yellow gold “S” hook clasp, forming a 15 inch necklace