J. Crew Multi Layer Necklace Gem Jewels Jewelry

Long J. crew necklace that’s really pretty and gorgeous with some weight. Triple layer necklace. Items haven’t been cleaned, most items are resold/vintage/used. Please see pictures for color/style. I try magnet test to determine if it’s gold/silver/copper/brass metal bc so much jewelry isn’t stamped/vintage. I guess on material so no guarantee. Not liable so review all pictures.