Color/Appearance: Heartwood can range from a lighter pale brown to a dark chocolate brown with darker brown streaks. Color can sometimes have a gray, purple, or reddish cast. Sapwood is nearly white. Wood from orchard trees that have been grafted with English Walnut (Juglans regia) may have a colorful/streaked appearance near the graft, which is sometimes referred to as “marbled Claro Walnut.” Claro Walnut can occasionally also be found with figured grain patterns such as: curly, crotch, and burl. Grain/Texture: Grain is usually straight, but can be irregular. Has a medium texture and moderate natural luster.
Claro Walnut Burl
Common Name(s): Claro Walnut, California Black Walnut
Scientific Name: Juglans hindsii (also J. californica)
Distribution: California and Oregon
Tree Size: 30-60 ft (9-18 m) tall, 3-5 ft (1-1.5 m) trunk diameter
Average Dried Weight: 40 lbs/ft3 (640 kg/m3)
Specific Gravity (Basic, 12% MC): .51, .64