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The Atlas Quarterly
The Atlas Quarterly field reports.
Dispatches from the desk. Field reports, edits, essays on stones we've worked since 1995.
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Dispatch · 001
Why we disclose treatments on every listing
The trade's quiet rule says you don't have to disclose universal treatments. We disagree, and here's our case.
The Stone Atlas · May 11, 2026
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Dispatch · 002
Understanding stone treatments: heat, irradiation, oiling
A deeper dive into the four major treatment types, what each does, and how to recognize stones that have been through each.
The Stone Atlas · Mar 24, 2026
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Dispatch · 003
Untreated vs treated stones: what disclosure means
Heat, irradiation, oiling, fracture-filling, dye — what each does, when it's standard practice, and why we disclose all of it.
The Stone Atlas · Mar 18, 2026
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Dispatch · 004
Buying smoky quartz: heat-treated vs naturally smoky
Almost all commercial smoky quartz is irradiated. Here's how to find natural material, and why most buyers shouldn't bother.
The Stone Atlas · Mar 8, 2026
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Dispatch · 005
Citrine vs heat-treated amethyst: how to tell them apart
Most commercial citrine isn't citrine at all — it's amethyst that's been baked. Here's how to tell the difference.
The Stone Atlas · Feb 26, 2026