Argentum™ Alloy
At Yoru, material is never just a technical decision — it is part of the story of how something lives with you over time.
This is why our pieces are crafted using Argentum Alloy.
At its core, it is a refined composition of .999 Fine Silver and 901 Alloy.
Compared to traditional 925 sterling silver, Argentum Alloy incorporates a greater presence of strengthening 901 alloy — rather than conventional metals like copper or brass — to better balance structural stiffness with the flexibility required for crafting and molding. At the same time, it preserves the soul of the silver jewelry people have long been familiar with.
It is a deliberate balance between softness and strength, purity and endurance.
Together, they create a material designed not just to exist — but to evolve.
What is 901 Alloy?
901 alloy is not a traditional jewelry metal.
It is a chromium–nickel–iron based superalloy, originally developed for environments where materials must withstand extreme stress, oxidation, and long-term exposure without losing integrity.
It is engineered for:
- High strength
- Corrosion resistance
- Structural stability over time
In other words — durability without brittleness.
By introducing this aerospace-grade alloy into silver, the material gains a quiet resilience that pure silver alone cannot achieve.
Why not pure silver?
Pure silver is beautiful — but soft. Too soft. Its malleability allows it to be shaped and sculpted, but without reinforcement, it is also more prone to deformation and accelerated oxidation.
Argentum Alloy preserves what matters most: With approximately 80.5% fine silver, the material retains the natural softness that allows our pieces to be molded, crafted, and finished by hand.
The remaining composition introduces the strength of 901 alloy — reinforcing the structure from within the core.
The result:
A silver that holds its form better, wears with intention, and resists rapid degradation without losing its organic character.
Strength without losing soul.
Most conventional silver jewelry relies on 925 sterling silver.
Sterling silver contains about 92.5% silver, with the remainder typically made up of copper or other metals to improve hardness.
While this increases strength, it often accelerates oxidation and shifts the aging process toward dullness rather than depth.
Argentum Alloy takes a different path.
By introducing a heavier and more sophisticated metallic structure — rather than relying on traditional copper-based reinforcement — the material gains durability while allowing oxidation and wear to unfold more gradually.
Not as damage.
But as character.
A material designed to age.
The presence of alloy within Argentum Alloy allows it to follow Yoru’s philosophy more faithfully:
To wear slowly.
To develop texture over time.
To become shaped not by perfection — but by presence.
Instead of resisting change completely, Argentum Alloy moderates it.
Preventing accelerated oxidation, while still allowing the surface to evolve naturally with use.
The intention
Argentum Alloy exists for one reason: To allow jewelry to remain structurally strong, while still being emotionally alive by incorporating a much larger composition of steel into its core.
It holds form — but invites time.
And in doing so, each piece becomes not just worn, but formed.
