Snowflake Obsidian chain). The balls of the chain are measuring approx. 4 mm (0.16 ") and the heart is approximately 20 mm. The necklace is strung on stainless steel. The length of the necklace is approximately 45 cm chain clasp is one of the most important components of the production. The clasp is a sturdy carabiner. All component parts are made of 925 sterling silver clasp. Item No. 8998. the chain is made by me with care and the highest quality materials. We will supply not to po boxes. Our letter shows fit usually in each.