Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
Banded calcite marketed as ‘onyx marble’ has been quarried at several Arizona sites for carving and tile. This atlas pin is labeled Mohave County but sits far from confirmed commercial quarries and has no matching GNIS feature—treat as unverified. Do not assume public collecting rights; many onyx sources are private or reclaimed.