Red Zircon

Origin and Geographical Distribution of Red Zircon

While colorless zircon is found across the globe, gem-quality red zircon has a much more limited supply, originating from just a handful of countries. The unique red tones form when trace elements are present during the stone's formation.

Primary Sources

The most prized red zircon hails from original mine locations in these countries:

• Cambodia. The Mondulkiri province produces deep red stones with purity and intensity of color highly sought after by collectors.
• Sri Lanka. Gems from the Ratnapura and Balangoda areas exhibit beautiful red hues.
• Thailand. An important source, Thai red zircon mines are in the Bo Phloi and Kanchanaburi regions.
• Tanzania. The Tunduru area yields some fine pinkish-red zircon.

Secondary Deposits

Beyond the main producer countries, red zircon also arises from:

• Australia – Orangy-red stones found as a byproduct of other mining
• Burma – Mostly pale red material of average quality
• Madagascar – A very small quantity of red zircon is occasionally found

So while many regions yield the more common colorless or golden zircon, only a handful of geographical areas harbor the environments needed for natural red zircon formation.

Limited quantities ensure that red zircon remains desirable among gem collectors, while the best-quality Cambodian gem materials remain highly sought after.

Physical and Chemical Properties of Red Zircon

Red zircon is a fascinating gem material that displays unique physical and chemical qualities responsible for its intense crimson coloration and other desirable attributes.

Chemical Composition

Chemically, red zircon is zirconium silicate, with the chemical formula:

ZrSiO4

What Gives Red Zircon Its Color

Red zircon gets its color from trace impurities of elements like iron and uranium that make their way inside the crystal structure. These impurities absorb certain wavelengths of light and transmit red wavelengths, giving red zircon its signature color. The exact hue can range from pinkish red to pure red.

Key Physical Properties

• Crystal System- Tetragonal
• Refractive Index- High at 1.92-1.98, close to diamond
• Dispersion- 0.039, very high like a diamond
• Mohs Hardness- 7.5, hard and durable
• Cleavage- None
• Fracture- Conchoidal and brittle
• Specific Gravity- 4.6-4.7, dense

Optical Properties

So while chemically simple, the unique tetragonal crystal system of red zircon combined with color-instilling trace elements produces a highly desirable, durable gemstone with exceptional optical performance. Handled with care, red zircon remains ever brilliant and fiery.

Treatment and Enhancement of Red Zircon

While most gemstones undergo treatments to improve quality, the majority of red zircon on the market is natural, untreated material.

However, some processes aim to enhance or intensify the desirable red coloration of this rare gem.

Heat Treatment

Heating is a common technique applied to lighter-colored or purplish-red stones to boost the red saturation.

Temperatures of around 1000°C for several hours shift trace elements within the crystal structure, driving out blue and purple tones to produce a more pure, intensified red. When done properly, heat-treated red zircon remains stable over time.

Irradiation

Exposing some red zircon to targeted radiation can eliminate undesirable secondary hues and heighten color purity. While considered a safe, stable process, there are strict regulations around irradiating gemstones that ensure low radiation levels.

 Always ask about irradiation when purchasing red zircon.

Dyeing

In some cases, red dye has been used illegally to create fake "red zircon" by coloring other varieties of zircon or simulants. Reputable gemologists using advanced testing equipment can usually detect this treatment.

Make sure any red zircon purchase comes with a lab certificate from a major gemological institute.

So while treatments exist to enhance red zircon, the most prized specimens exhibit their captivating, saturated red tones entirely naturally.

When sourcing red zircons, prioritize gems that have certification confirming no modifications, as these will retain their most valuable and stunning beauty.

Our jewelry store, vividcarat.com, has a wide selection of these adorable gemstones. Explore the list of all loose zircons and jewelry with zircon encrustations available in stock. When it comes to buying gemstones, we provide full assistance, as well as the option of ordering custom jewelry items based on your designs. Our jewelry store works in New York City.

The Value of Red Zircon: Market Insights and Prices Per Carat

Among colored gemstones, red zircon has a small but dedicated following. Its vibrant red tones command a high value, especially for rare, large stones with intense and saturated hues.

Here’s an overview of what impacts the price of natural red zircon.

Color Saturation Drives Value

Like other colored stones, the depth of color is perhaps the most important contributor to red zircon’s value. Stones exhibiting a pure, rich red command the highest prices per carat in New York City. Pinkish or brownish-red tones are less desirable and affordable.

Clarity and Cutting Matter Too

While included stones with good face-up color can still fetch decent values, clean red zircons are most prized. Precision cutting that maximizes color saturation also boosts price.

Some popular cuts include:

• Oval – Ideal for showing off saturated color
• Round – Displays a fiery red flash
• Emerald – Enhances the deep red hue

Average Red Zircon Price Per Carat

The most commercially available smaller melee red zircons fall in the light to medium ranges. Well-cut gems over 2 carats with rich color can cost over $1000 per carat.

Top Quality Commands Top Dollar in New York City

While still considered a niche stone, top-quality red zircon with certifications from reputable gem labs can sell for premium prices to discerning collectors. Patient buyers may uncover good values during periodic market dips. But overall, fine red zircon remains an exclusive, coveted colored gem.