For your consideration are these medium to small Opalite tumbled stones. Opalite is a form of glass made with powdered Fluorite and it changes color in different lighting situations.
These pieces are sold in sets of 6 and measure .5 to 1 inch with most are around .75 inch. They are on the flatter end of the spectrum making them perfect for wire wrapping and crystal grids.
Opalite is thought to enhances intuition and psychic abilities. Improves communication and manifests wealth. Balances emotions and strengthens interpersonal skills.
Chakra: Crown