David, have you thought about contacting a stone carver who works with basalt? It sounds like the pieces you're looking for would be fairly small. Surely they would have some 'tailings' from large sculptures that they'd be willing to part with. |
Here is a link that might be useful: some california stone artists
| Lots of basalt lava flows in Oregon/Washington ....near the MacKenzie Pass area in Oregon....I am also including a link to some Google listings Happy rocking Vicki |
Here is a link that might be useful: Basalt places in Oregon
| David, Are the columns you refer to the hexagonal crystal shape? I saw an example of this feature at Devils's Postpile National Monument which is on the far side of Yosemite, south of Mono Lake. It may be protected from rock hounds, and I think the crystals may all form at a specific size, but it is a wonder to see! |
Here is a link that might be useful: Devils Postpile