These are really pretty. Polished and faceted Ametrine olive beads. Each strand of these beauties is unique, no two beads are alike in coloring shape or size. The average size of these Ametrine olives is 16 x 12mm, some are are noticeably smaller, and others larger. Ametrine is a variety of quartz that contains both Amethyst and Citrine sectors in the same crystal. Both Amethyst and Citrine are colored by small amounts of iron. Our natural Ametrine beads are produced from the Anahi mine in Eastern Bolivia. Ametrine is known as a calming stone, very useful in meditation. Ametrine is also known for it's a powerful cleansing powers.