What Is a Herkimer Diamond?

A Herkimer Diamond isn't a diamond at all. It's a naturally double-terminated quartz crystal found in and around Herkimer County, New York.

What makes them unusual: they grow with two pointed ends and near-perfect natural facets, so they look cut and polished even when they aren't. That accidental resemblance to a cut diamond is how they got the name.

Why they're prized

Herkimers form very slowly inside pockets of dolomite. Because they grow suspended in a small cavity (rather than attached to a surface), they develop those two clean points and their signature clarity — many are so transparent you can read text through them.

They're small compared to most quartz — usually the size of a fingernail or smaller — but each one is essentially a natural sculpture.

Their metaphysical association

In crystal-healing traditions, Herkimer Diamonds are known as stones of attunement and amplification — associated with clarity, awareness, and a "clearer signal" for whatever intention you set with them.

They're often paired with other stones (like Moldavite) to amplify the effect of that companion stone.

How to spot a real one

Real Herkimers:

• Have two natural points (no cutting)
• Show tiny internal inclusions, sometimes bubbles or specks of anthraxolite (a black carbon-based mineral)
• Are geographically specific — true Herkimers only come from Herkimer County, NY
• Come in a range of sizes, most small

If a "Herkimer" is unusually large, cheap, or perfectly clean, it may be lab-grown or just double-terminated quartz from another source.