Zircon: Meaning, Symbolic Properties, Care

What is zircon?

Zircon is a natural zirconium silicate (ZrSiO4), from the nesosilicate group. In its pure form it is colourless; impurities give it gold, red, brown, green, blue or black. Its hardness ranges from 6.5 to 7.5: the most intact crystals are the hardest. Zircon is strongly refractive: it returns a great deal of light and sparkles almost like a diamond, which is why it was long confused with diamond.

Its name comes from the Arabic zarqun (cinnabar) or the Persian zargun (“golden”). Yellow zircons with garnet-like flashes were once called hyacinth. The mineral is found mainly in alluvial deposits (river sands and gravels): the richest deposits are in India, the United States, Australia, Ceylon (Sri Lanka) and South Africa.

One of Earth’s oldest witnesses

Zircons are extremely resistant to erosion. Grains found in the Narryer gneiss, in Western Australia, have been dated to about 4.4 billion years: they are the oldest known mineral witnesses on Earth. Geologists use them as clocks: zircon contains traces of uranium and thorium, radioactive elements that slowly decay into lead, which makes uranium-lead dating possible.

This natural radioactivity is very low and, according to the Gemological Institute of America, nearly all zircons used in jewellery are of the “high” type, whose structure is little damaged. If you are buying an old, raw or rare piece and this concerns you, ask a laboratory for advice.

Traditional symbolism

In the Middle Ages, lapidaries associated hyacinth with sleep, prudence and honours; these texts mix together many stones of similar colours. Today, modern tradition links zircon with clarity, brilliance and determination, as well as constancy: its geological age gives it the image of the Earth’s memory.

These associations are symbolic and cultural; they have no medical or predictive value.

Traditional correspondences

Authors differ widely. For a specific chakra, see for example the solar plexus. Zircon also appears in some lists of December birthstones (December birthstones).

How to use it

• In a ring, pendant or earrings, especially in colourless, blue or golden stones.
• As an alternative to diamond for those who want a natural stone at a more accessible price, keeping its limits in mind.
• As a small raw crystal for a mineral collection.
• As a symbol of patience, when you think of the billions of years of its history.

Care and cleansing

Even though it is hard, zircon is brittle: its edges can chip under a knock, and its facets wear faster than those of a sapphire. Take it off for manual work and store it separately. Wash it in lukewarm soapy water with a soft brush. Avoid strong heat and thermal shock: heating can alter certain colours.

For symbolic cleansing: gentle smoke, moonlight or selenite. See cleansing and recharging your stones.

Treatments and imitations: zircon or zirconia?

• Heating: many brown or cloudy zircons are heated to become blue, golden or colourless. This is a very common treatment and should be disclosed.
• Cubic zirconia: this is NOT zircon. It is a zirconium oxide (ZrO2) made in a laboratory, widely used to imitate diamond. The word “zircon” is sometimes wrongly used for zirconia.
• Other imitations: glass, spinel or synthetic corundum for colours.
• Ask whether the stone is “natural zircon”: it is a gemstone in its own right, and more expensive than zirconia.

How to choose one

Look at the brilliance, the even colour, and the absence of chips on the edges. Blue, golden or colourless zircon is the most common in jewellery; deep reds are rarer. It is generally more affordable than diamond, but more fragile. For an everyday piece, a pendant or earrings are safer than a ring. It pairs well with aquamarine, topaz or rock crystal. See also how to choose and care for your stones.

Frequently asked questions

Also read

The meanings mentioned belong to tradition and symbolism. They are neither promises of results nor medical advice. Back to Guide to stones.