A Stunning men’s macrame necklace featuring a silver obsidian centre stone, frosted agate Crystals and hematite saucers.Necklace length is adjustable from 20 inches to 28 inches.Gems and beads are 100% genuine and ethically sourced.You could complete the set with the matching bracelet in the 'jewellery sets' section of my shop.Commonly known as nature's glass Obsidian stone is an igneous rock that forms when molten rock material cools rapidly. The result is an volcanic glass with a smooth texture.Agates are a variety of chalcedony, and are a microcrystalline quartz.