High-Quality Rubellite Bracelet Inner diameter approximately 16cm (+ 3.5cm adjuster) Rubellite button cut, approximately 3.5mm All metal parts used are 14kgf. Nylon-coated wire 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 is applied using heat and pressure, making it highly durable. It is also known as "gold filled." Unlike gold plating, there is almost no risk of the plating peeling off quickly. It is a material that allows you to easily enjoy the shine of real gold. As it is a natural stone, there may be inclusions, small scratches, chips, and dents, but please understand that this is a natural characteristic. The color may appear different depending on the device you are using. Please understand.