Check the listing for details. Agate Palm Stone 2.35"/69 Grams. Condition: New. Listed at 5.00 USD. The color variations happen due to different mineral deposits during its formation. Agate is usually translucent to opaque, allowing for an interplay of light through the bands. Agate is a popular variety of chalcedony, a form of microcrystalline quartz, characterized by its distinct banding and wide range of colors.