What is banded "onyx" or this material that many call “onyx” today? This “onyx” is a calcium carbonate that is usually banded (and therefore resembles banded agate). It is also called travertine or flow stone and is a hydrothermal alteration of limestone. Much of this material comes from Mexico, Morocco and Pakistan. When water is charged by calcium bicarbonate, massive crystalline calcium carbonate deposits are formed. This happens when the carbon dioxide in the water is driven out by heat and pressure. The water cools and the pressure drops. The calcium carbonate precipitates out of solution to form "onyx". Trace elements in the solution, and algae in the environment, help the process of precipitation.

The banding results from continuous sequential deposition of the carbonate minerals which creates the beautiful colors and patterns formed in this material. Most of our banded "onyx" is from Balochistan Province in western Pakistan. The solid stone blocks are turned on lathes by artisans to create the beautiful bowls, vases and plates that we carry.

This material is also often found in massive form. The material is then cut into blocks and flats that are manufactured into finished product, often used in accessories in home furnishings.

Use this product with care to protect its surface. Acidic food and wine will dull the surface of the stone over time. This material is not safe for use in the dishwasher or microwave. With proper care you can enjoy having this banded onyx for many years to come.