This is a lovely cab of Hickoryite. Yes, it does indeed look like Hickory wood, but is instead made of a banded variety of rhyolite, some of which resembles rhyolite wonderstone. It's from an area near Rodeo, State of Durango, Mexico.

Hickoryite is rhyolite, which is an extrusive igneous rock with fine-grained crystals that include quartz, feldspar, and mica, the same general chemical composition as granite.

Although this is a cab, you can also glue on "bails", or have the piece drilled to accept a pinch bail. Either approach will let you turn this sample into a fine pendant.