These are my own handmade parts. Please understand that they may have slight imperfections as they are not machine-made. Size: 29-52mm (length) x 9-14mm (width) 10 pieces each x 2 colors The rough rock crystal has been color-coated on the raw stone (crystal). Natural stones are a gift from nature. They are not artificially made minerals, so there may be cracks and inclusions (such as the original rock), and variations in shape and pattern. We appreciate your understanding of the nature of natural materials.