Salem, Massachusetts
No molds, no mass runs, no shortcuts.Handmade borosilicate glass by Shayne “Treso” Lefrancois in Salem, Massachusetts.
#WhereIsTresoWednesday — Every Wednesday · clue drops 9am ET
Enter nowThe Drop · Updated weekly
Everything time-sensitive lives in one place — live raffles, limited releases and the weekly #WhereIsTresoWednesday hunt.
Every piece is created in the flame.
Only the best glass & metals.
No molds, no mass runs, no shortcuts.
Made with fire in the birthplace of legends.
Available now
And you deserve the best things — so we make them. Swipe the rail; every piece is one of one.
Rig · Available
$750
Rig · Available
$750
Sherlock · Available
$25
Sherlock · Available
$25
Sherlock · Available
$25
Pipe · Available
$20
Pipe · Available
$20
Pipe · Available
$20
Shop
Inquiry-first — you'll usually hear back the same day.
Featured Collections
Every collection pulls from the same bench — silver, gold, clear rod, and a torch that runs hot.
The pieces that pull the most color out of silver and gold.
ExplorePieces built shoulder to shoulder with other flameworkers and the Witch DR crew.
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Dark, moody work made in and inspired by Salem, Massachusetts.
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Pendants, earrings and jewelry meant to be worn every day.
ExplorePipes, sherlocks, rigs and functional glass built to last.
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Approachable one-of-a-kind work at gift-budget prices.
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Commissioned work made around your idea, from sketch to flame.
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New techniques, odd shapes, and happy accidents from the bench.
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About
Shayne "Treso" Lefrancois is a borosilicate glass artist with more than ten years of flame-working experience. His work focuses on fume techniques using silver and gold, transforming clear glass into colorful, layered, one-of-a-kind pieces. Through Treso Glass, he creates jewelry, pendants, cups, jars, custom pieces, and introductory flame-working experiences.
Wearable fire, functional art, and custom pieces built to outlast trends. No molds, no mass runs, no shortcuts.
The Technique
Tiny amounts of silver and gold vaporize in the flame and bond with the glass, creating color, depth and smoke-like movement. The result is unpredictable in the best way — every piece is slightly different.
The Collective
Every month the studio hands a shelf to another artist. Their pieces show up here and in the shop for as long as the feature runs.
Next feature announced soon
Collabs
Some of the best pieces come out of two benches instead of one. Meet the makers behind the collab work.
Flameworker & pipe maker · Central Massachusetts
Dan is a central-Massachusetts flameworker known for linework — wig wag, chip stack and incalmo — and for paying homage to the shapes that built modern pipe making while pushing color and form somewhere new. The Dan Longden x Treso rig pairs his line and form work with Treso's fume.
See Dan's workGlass studio & gallery · Salem, MA
Family-owned Salem glass blowing studio and gallery, open since 2012, with live in-store blowing and American-made glass. Treso works out of the Witch DR studio, and a large part of the current catalog is released as Witch DR x Dr. Treso.
Shop the Witch DR collectionVenmo is the fastest way to pay. Cash works in person at markets, and invoices can be sent for wholesale or larger custom work.
Where's Treso
Markets, pop-ups and demos around the North Shore.
No dates on the calendar yet — join the list to hear first.
From the Bench
August 2, 2026
What actually happens when silver and gold hit 2,000 degrees, and why the color can never be repeated exactly.
Read the articleJuly 18, 2026
Perfect symmetry is a machine's signature. Here's the case for keeping the fingerprints in the work.
Read the articleJune 30, 2026
How a city built on fog, folklore and sea air ended up shaping a whole palette of work.
Read the articleEvery Wednesday: #WhereIsTresoWednesday — find the clue, post the photo, win glass.
Stay Close to the Fire
New pieces, market dates and studio experiments — a few emails a month, no more.
No spam. Just fire.
