Iolite and Peridot Drop Necklace in 14k Gold Fill Dainty Etsy Iolite Pendant lab Iolite Necklace Gemstone Necklace Etsy Iolite and Peridot Drop Necklace in 14k Goldfill Dainty Etsy Iolite and Peridot Drop Necklace in 14k Goldfill Dainty Etsy. Our version of layering should always include colorful gems. We created a mini collection of delicate layering chains with a few of our best selling, wear with anything stones. Of course, they also look great alone as sweet floating neck gems. This one features a vibrant iolite gemstone in 14k gold plated . 925 Italian fine silver. Length is 16" with an extension for up to 18". No two stones are ever the same. Slight variations in color and size are what make them so unique.