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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
Setting working stones in jewelry: cabochon vs faceted
Why a cabochon is sometimes the right choice for a stone you'd faceted — and what setters look for in each.
The Stone Atlas · Apr 27, 2026
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Dispatch · 002
Storing your specimen collection: humidity, light, dust
How to keep a mineral collection from degrading over years and decades.
The Stone Atlas · Apr 25, 2026
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Dispatch · 003
How to clean amethyst (and which methods will damage it)
Amethyst is Mohs 7 — durable enough for daily wear, but specific cleaning methods will fade or damage it.
The Stone Atlas · Apr 23, 2026
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Dispatch · 004
Tucson 2026: what to expect
What's new for the 2026 gem show season — and what to plan for if you're attending for the first time.
The Stone Atlas · Apr 21, 2026
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Dispatch · 005
Domestic US gemstones: where to find them
Twelve gemstones produced commercially in the United States — and where each one comes from.
The Stone Atlas · Apr 19, 2026
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Dispatch · 006
Burmese rubies and the US embargo
Why "Burmese ruby" still commands a premium despite the trade restrictions — and what's legal to buy in the US.
The Stone Atlas · Apr 17, 2026
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Dispatch · 007
Garnet from Mozambique: what changed in 2008
When new deposits in Mozambique opened, the global garnet trade shifted overnight. Here's what happened and what you can buy now.
The Stone Atlas · Apr 15, 2026
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Dispatch · 008
Carnelian in Indonesia and India
Two centers of the carnelian trade — and what makes them different from Brazilian material.
The Stone Atlas · Apr 13, 2026
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Dispatch · 009
Lapis from Afghanistan: the only commercial source
The 7,000-year-old mining tradition at Sar-e-Sang, and why no other deposit has ever matched it.
The Stone Atlas · Apr 11, 2026
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Dispatch · 010
Why so much amethyst comes from Boa Vista
The geology of southern Brazil's amethyst belt — and why one area produces more dark amethyst than anywhere else on Earth.
The Stone Atlas · Apr 9, 2026
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Dispatch · 011
The Madagascar gem trail
Eight major gem species from one island — and why the country has become the colored-stone trade's quiet workhorse.
The Stone Atlas · Apr 7, 2026
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Dispatch · 012
Teófilo Otoni, Brazil: world capital of tourmaline
How a small city in Minas Gerais became the global center for tourmaline cutting, brokering, and pricing.
The Stone Atlas · Apr 5, 2026