Agate Tree   A sliced agate that evokes a knot in a tree was the starting point of the design of this stained glass panel. Thinly cut and polished to look like glass, the agate piece as a focal point gives this piece a dramatic 'core' to highlight the richly coloured and textured hand blown stained glass.   Inset detailed tree images flank the main tree with textured metal mimicking the texture of bark.