These gorgeous crystals have a beautiful, deep blue base with an Aurora Borealis coating that sparkles and shines with shades of yellow, green, and purple. The multitude of shimmering colors makes this a stunning necklace! The color blue has tremendous power to manage stress. It's a very soothing color that helps calm your mind, slow your heart rate, lower your blood pressure and reduce anxiety. The color blue also aids intuition and is associated with depth, faith, and tranquility. This elegant single-strand Preciosa Crystal Choker Necklace is made with high-quality 4mm Preciosa Montana AB bicone crystals and a gunmetal extender chain and lobster clasp. Preciosa Crystals are a perfect, more affordable alternative to Swarovski. ✧ ∙ SIZE ∙ ✧ Fits Choker Sizes 12-15 (approximate) About 12.5 inches long with an additional 3-inch extender chain for a perfect, adjustable fit. blue crystal necklace, blue choker, blue necklace, crystal jewelry, crystal choker necklace, adjustable, navy necklace, blue stone necklace, navy choker, Preciosa crystal necklace, Preciosa, blue jewelry, bridal necklace, bridesmaid necklace, ab crystal necklace, Preciosa choker, gift for her