Tanzanite Tumbled Stone Bracelet Inner diameter: approximately 16cm (+ adjuster 4.5cm) Tumbled stones, approximately 3.5~9mm in size This is a Tanzanite with a beautiful lavender color and transparency. All metal parts are 14kgf (14k gold-filled) parts. Nylon-coated wire is used. What is 14kgf (14k gold-filled)? Unlike regular gold plating (GP: gold plated), 14kgf uses a base metal alloy, such as brass, and coats it with a gold alloy that makes up 1/20 (5%) of the total weight. The gold coating layer is 20-30 times thicker, and it is coated with heat and pressure, making it highly durable. It is also known as "gold-filled." Unlike gold plating, there is almost no worry of the plating peeling off quickly. It is a material that allows you to easily enjoy the shine of real gold. The images have not been processed, but the color may appear different depending on the device you are viewing them on. Please understand.