Zircon Buying Guide - What factors to look out for before deciding to buy

Color

Brilliant blues dominate the world of Zircon gemstones, ranging from light sky blue and turquoise tones to intense and deep navy colors. The blue color is just about always the result of heat treatment and the same can be said for white zircons.

This treatment is fairly difficult to detect but so universal that you should be very wary of any seller claiming to have untreated blue or clear zircons.

Zircons can also be found in pink, red, orange and brown with some of the earthy burnt orange versions displaying stunning autumnal colors.

Natural green zircon is considered to be the rarest and potentially the most expensive form.

Clarity

Generally all zircon gemstones have high levels of clarity so accept nothing less than eye-clean examples – an informal term to describe gemstones with no visible blemishes or inclusions.

For collectors there are some untreated zircons with a cloudy appearance but interesting colors that may appeal.

Carat

Zircons tend to come in smaller sizes than similar gemstones such as topaz and aquamarine but some blue stones can be found in impressive dimensions of between 5 and 10 carats and many reds and oranges come in at a little less than 5 carats.

Zircon is a very dense gemstone so a 5 carat zircon will look smaller than a 5 carat topaz for example - always buy based on actual millimeter size so you know exactly what you are getting.

Cut / Shape

The most popular cuts for zircon are 'oval step cuts' and 'round diamond cuts'. The 'octagon step cuts' are the more desired ones since they show very clear and even colors but they do require more rough to begin with. In all cuts the cutter has to be experienced so the stone is cut in the correct angles to show the proper reflections and fire.

They are indeed tricky to cut because they can look different in color when viewed from different angles – a phenomenon known as pleochroism. The cutter will want the most attractive and strongest color to be seen from the top (table) of the gemstone.

Jewelry

Zircon is rated at around 7 on the Mohs hardness scale so is good for most types of jewelry although it is considered rather a brittle gemstones so an exposed ring setting could be liable to break or shatter if hit too hard.

With the characteristic fire or brilliance that makes them sparkle more than most gemstones, Zircons are an excellent alternative for Diamonds. Although they are not anywhere near as durable they are considerably less expensive.

Treatments

White and blue zircons are typically heat treated to either give them color or to completely remove color. Since completely natural blue or clear zircons are virtually non-existent there are no issues about paying premiums for untreated gemstones. Assume they are all treated.

Zircons in other colors such as orange, red, brown and pink are generally untreated but since all zircons tend to be very reasonably priced, heat treated or not, it is a matter of individual preference whether to buy or not.

Price

Zircon is a quality gemstone with a long history and a special sparkle that is the envy of most other gems. Despite this, it can be bought for very reasonable prices with the larger carat sizes getting the highest prices no matter which color.

Birthstone

Blue Zircon is one of the birthstones for December.

Durability

Although Zircon is hard enough to resist most scratches it is quite brittle - a sharp knock in the wrong place could break the gemstone. This is due to its indistinct cleavage so zircon jewelry should be worn with care.

Zircon is rated 6.5 – 7.5 on Mohs Hardness Scale