Agate Large Axes Arrowheads are available here. The simplest test is to scratch the agate on a glass surface, a bottle or a tumbler. Agate will cut glass. If you have slabs you should see irregular patterning within the bands when viewed aagainst a light rather than clear consistent colour and translucency, bubbles are never present in agate. This stone is especially useful to those who practice Feng Shui in their home. Place an order at Natural Agate.