[image: 220px-BernsteinBowls.jpg] The brick-bond version with the wedges rotated half-a-turn in alternate rings is indeed quite common, especially with two or more contrasting colored woods used for alternating wedges in a ring, which can give 'spiral' effects etc. However the 'stacked' version is also sometimes used with wedges that are mainly all of the same wood but with thin slivers or narrower wedges of contrasting colored wood inserted between every wedge in every ring and perhaps even between the rings themselves to produce a 'net' pattern... There are many permutations - even leaving out wedges to make a 'pierced' surface... Enjoy makin' shavin's...