Amethyst Lace Agate is an uncommon & highly desirable variety of banded Chalcedony, a mineral of the Quartz family. It is predominantly purple, with layers of creamy browns, reds, blacks and grays. Some may include layers of yellow ochre, gold, scarlet and red. Agate is sometimes called the earth rainbow because, in its various forms, the concentric bands in nature form nearly every color the earth can produce, including a colorless form. This bag weighs 8 oz. and will contain an average of 3-6 Gemmy pieces. Some Very Nice Medium To Dark Purple color here! See images above for what samples of rough & polished stones may look like .Great refill for any Beginner,novice or advanced Tumbler / hobbyist using One of the popular Rock Tumblers.NOTE* This Bag DOES Not contain Grits, Findings, jewelry parts or adhesives that may have been included with the original tumbler accessories. Use the Tumbling instructions from the tumbler manufacturer.