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Diane,
When ripped into slabs redwood burl will exhibit the many minute individual bud, or branch eyes. It's referred to as "lace burl" by the burl cutters where I live, and it is highly valued.
Nurls, when ripped, exhibit a twisted grain that often looks like fire, flare, more typical of root pattern. Nurls do not exhibit any bud eyes or lace pattern.
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Here is an example of both kinds. The lace burl is european elm ( ulmus glabra), the "nurl" is beech (fagus sylvatica).
Diane,
When ripped into slabs redwood burl will exhibit the many minute individual bud, or branch eyes. It's referred to as "lace burl" by the burl cutters where I live, and it is highly valued.
Nurls, when ripped, exhibit a twisted grain that often looks like fire, flare, more typical of root pattern. Nurls do not exhibit any bud eyes or lace pattern.
[/ QUOTE ]
Here is an example of both kinds. The lace burl is european elm ( ulmus glabra), the "nurl" is beech (fagus sylvatica).