Feature: Agate knives are made from pure natural agate, which is healthy and safe. Suitable for polishing surfaces of gold, silver, platinum, jewelry and other metals. There are different shapes and sizes that will suit your different needs. Agate will not damage or destroy precious metals, stones or other materials. It can clean all kinds of dirt from gold, silver, copper, very convenient to use. Specification: Item Type: Agate Burner Application: gold, silver, platinum, polishing jewelry surface. Material: agate (knife), bamboo, iron (handle) Handle Size: Bamboo handle Knife edge: approx. 23,5 cm / 9,3 inch Bamboo handle Sword edge: approx. 22.5 / 8.9 inches Knife edge with iron handle (long): approx. 19,5 cm / 7,7 inch Sword edge with iron handle (long): approx. 20 cm / 7,9 inch Knife edge with iron handle (short): approx. 14,5 cm / 5,7 inch Sword edge with iron handle (short): approx. 14 cm / 5,5 inch List of packages: 6 x agate burners The agate knife is made of pure natural agate in grey and red.