* North Carolina: This state is particularly known for its rubies, found in the Cowee Valley, near the town of Franklin. It's one of the oldest ruby mining areas in the US.
* Montana: Rubies can be found in the Sapphire Mountains of Montana, alongside sapphires.
* Wyoming: Small ruby deposits have been found in Wyoming, but they are not as significant as those in North Carolina or Montana.
* California: While not as common as in other states, rubies have been found in small quantities in California, especially in the San Jacinto Mountains.
It's worth noting that while these states have known ruby occurrences, they are not necessarily actively mined for rubies. The most significant commercial ruby deposits are found in countries like Myanmar (Burma), Thailand, Madagascar, and Vietnam.
