Black Zirconium: From Metal to Masterpiece
Black zirconium is a contemporary and striking material used in modern jewellery, particularly for wedding bands and rings. Its unique appearance and properties make it a popular alternative to traditional metals. This article explains what black zirconium is and how it gets its deep, black colour.
What is Zirconium?
Zirconium is a natural element, a transitional metal that, in its pure form, has a colour similar to that of titanium—a greyish-white. It is known for being extremely strong, durable, and highly resistant to corrosion. Like titanium, it is also hypoallergenic, making it a safe and comfortable choice for those with sensitive skin.
The Process of Creating a Black Zirconium Ring
The signature black colour of zirconium rings is not the metal's natural state. It is the result of a specialized heat-treating process.
Preparation: A ring is first crafted from pure zirconium using a CNC lathe and then hand finished.
Heating: The ring is then heated to an extremely high temperature in a special kiln.
Oxidation: As the metal is heated, it reacts with the air, causing a layer of zirconium oxide to form on its surface. This process is a controlled oxidation.
Transformation:
As the temperature increases, the oxide layer changes colour. At a certain temperature, the layer transforms into a dense, smooth, and incredibly hard black ceramic-like coating. This black oxide layer is what gives the ring its deep, dark black colour. It is not a surface plating or an applied coating, but a permanent transformation of the metal itself. This means the black colour will not chip, peel, or fade over time, ensuring the ring maintains its distinctive look for a lifetime. (Excluding any harsh treatment due to damage by rubbing or knocking against hard materials)