Malachite is a green mineral, an ore of copper. It comes in green striped with black and a mixture of greens that look like moire silk. This necklace has both types of malachite. The beads are graduated from 9/16" to 1/4" top to bottom. The malachite beads are separated with tiny glass beads. The necklace is 28" long and goes on over the head easily. Malachite is heavy, and the necklace weighs 4.8 ounces. There are no chips that I have seen. Excellent vintage condition. The seller said it was her mother's and is from the 1930s.