METAL: sterling silver. GEMSTONES: multi gemstones including: hematite, onyx, garnet, jade. MEASUREMENTS: shortest hematite necklace is 20" long. Garnet necklace is 23" long and does not have a clasp. Longest jade onyx necklace is 35" long. WEIGHT: 470.3 grams.Gemstones have not been graded for color and clarity, and tested for clarity and color enhancement, unless stated otherwise.