Average Weight Based on 18 Inches Average weight - grams depending on the product Metal: Silver <-- Split -->chain width: 5.9mm <-- Slit --> Hallmarking Guide: Gold less than 1g not stamped. More than 1g stamped. Hallmarking Guide: Sterling Silver less than 7.78g not stamped but has a 925 mark. More than 7.78g stamped.
