The Austrian crystals give this necklace a serious sparkle level and the central stones move freely along the track set inside the oval shaped rectangle. Crystals are also set around the rectangle, although these ones do not move. Altogether, a very eye-catching piece. Set on a 16" / 40 cm chain, it comes with a 2" / 5 cm extender. The necklace sits at the base of the neck. Materials: Silver ion plated stainless steel with Austrian crystals Weight: 3-4 gm Length: Necklace 40 cm / 16" with 5 cm / 2" extender chain, Pendant: 6 mm tall x 23 mm wide And what in the world is Ion Plating? Super thin coating that increases shine, is hypoallergenic and can add any colour or more expensive precious metals (gold, rhodium, sterling silver or platinum) to the steel. 316L Stainless Steel is making stunning jewellery. Stainless steel is an alloy, primarily iron mixed with Chromium. Chromium serves as a protective layer. Chromium decreases oxidation, keeping your jewellery shiny for much longer than Titanium (which is also much more expensive). Protects also from any possible allergic reactions to trace amounts of other metals in the stainless steel. No corrosion No tarnishing No rusting Scratch-resistant End result? Sleep, swim and go to work with it. Caring for it: Wash with a little soap and water. We love it. And so will you.