Frederic Duclos 925 Pearl Drop Necklace

This is a Frederick Duclos 925 pearl and I think maybe Malachite? 18" long necklace. The drop pendant is 2". It is marked 925 on the lobster style closure. Has a hang tag stamped Frederic Duclos on one side and Ita With the letters DC. This necklace is in excellent condition. Feel free to ask questions. Thanks for looking!