Tortoiseshell was one of the most prized materials in the world. Then it had to disappear. What replaced it is better than the original, and there is a reason. Reading time: 4'
Hold a tortoiseshell frame up to the light and it does something flat colour never can. The browns, ambers and near-blacks sit at different depths, the pattern drifts as you turn it, and no two frames carry the same one. For centuries that effect could only come from one place, and it came at a price almost no one talks about today.
A material the world could not stop wanting
Real tortoiseshell was never tortoise at all. It came from the shell of the hawksbill sea turtle, prized for hundreds of years for combs, jewellery, cigarette cases and, of course, spectacle frames. It was warm, workable, endlessly varied, and no factory on earth could replicate it. That rarity is exactly what made it a material of luxury, and what nearly wiped the animal out.
By the twentieth century the hawksbill had been hunted to the edge of extinction. In 1977, the international body that regulates wildlife trade, CITES, gave the hawksbill its highest level of protection and banned the commercial trade in its shell. Today the species is still listed as critically endangered. The most beautiful material in eyewear had become one you could no longer use, and rightly so.
Solving an impossible problem
Which left makers facing a question they had, in truth, been circling for a long time. Imitations of tortoiseshell had existed since the late nineteenth century, first in celluloid, made not out of conscience but because the real shell was scarce and expensive. The ban simply settled the matter for good. How do you recreate something nature took millions of years to make, without taking a single shell? By the 1980s the answer had become acetate. Not a print, not a coating, but colour mixed inside the material itself: amber, caramel, mahogany and black, pressed together layer on layer, and then allowed to swirl as the sheet is formed.
That is the part worth understanding. The tortoiseshell pattern in a good acetate frame is not painted on the surface. It runs all the way through, which is why it has depth instead of looking flat, and why it survives years of wear without fading off. And because the colours are left to move as the material sets, the pattern is never drawn twice. No two frames are the same. Never.
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Dark havana, in the hand The Havana Route. The pattern runs all the way through, and this one exists only once. |
Light and dark, the same process
Put two tortoiseshell frames side by side and the range becomes obvious. A light havana glows from within when the sun hits it, the amber edges turning almost translucent. A dark havana absorbs that same light, dense and deep, the black and mahogany reading as quiet rather than loud. Same idea, same process, two completely different objects. That is the freedom the reinvented material gives you that the original never could.
Watch: the story of tortoiseshell, in under a minute (in Spanish).
What this means for SWT
When you pick up a tortoiseshell frame from us, that is the history in your hand. Not a decorative finish chosen because it looks good in a photo, but a pattern that carries the memory of a material the world had to leave behind, recreated honestly in acetate so that nothing has to be hunted for it. It is how tortoiseshell evolved, without losing what made it special in the first place.
And like the original, every single piece comes out different. The frame you end up with is the only one exactly like it. That is not a marketing line. It is simply how the material works.
The tortoiseshell runs across all three collections, from the light havana of the Oliver to the dark havana that carries through the Havana Route, the Splendido and the Strada frames.
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Never drawn twice Light havana or dark, every frame carries a pattern of its own. |
