Agate is a variety of silica, characterised by its fineness of grain and brightness of colour. Agate is one of the most common materials used in the art of hardstone carving and are used to make ornaments such as pins, brooches or other types of jewellery, Most agates occur as nodules in volcanic rocks or ancient lavas. Dulcote Agate, Slicedfrom UKSIMILAR TO SEEN: The image shows an example of the single specimen you will receive. This will be picked from our stock box graded and with a size within the minimum and maximum size range indicated. It will not be the exact specimen in the photo, the colours, shape, size and style may vary as with any natural item.