quartz cz crystal earrings signed ibb sterling nwot

Swarovski crystals? (Saw on another listing) Quartz (topaz cz?) Earrings I believe it says ibb cn 925. Marked and tested 925 vintage stud earrings. I have a very similar same brand necklace please check my listings or message. IBB stands for the “International Bullion & Metal Brokers”, an international group of companies that manufacture and distribute gold, silver and diamond jewelry. The organization was established in London in 1974. The stamp indicates that the metal met the IBB standards. Listed for $45 on another platform