Natural Zircon

The crystal structure of zircon is tetragonal crystal system. The natural color of zircon varies between colorless, yellow-golden, red, brown, blue, and green.

High zircons gemstone are fully crystalline and give the higher RI, DR and SGs of the zircon family.

Low zircon gemstone, over geological time low zircons have lost their crystalline structure due to the continuous bombardment of the crystal structure by alpha particles emanating from included uranium and thorium

Zircon gemstone like spinel and corundum truns up in a number of fancy colours., red, rad-orange, brown, blue, yellow, green and colourless zircon.

Natural zircon gemstones are prized for their brilliant luster and a wide range of colors. Often mistaken for synthetic cubic zirconia, natural zircon is a distinct and valuable gem with a rich history. Here's an in-depth look at natural zircon gemstones:

Origin and Formation

Geological Formation: Zircon forms in igneous, metamorphic, and sedimentary rocks. It crystallizes from magma or forms in hydrothermal veins.
Mining Locations: Significant sources of zircon include Sri Lanka, Cambodia, Myanmar, Australia, and Tanzania.

Colors and Varieties

Color Range: Zircon occurs in a variety of colors, including blue, red, yellow, orange, green, and colorless. The color is influenced by trace elements and radiation exposure.
Blue Zircon: One of the most popular colors, achieved through heat treatment. The natural blue zircon is rare.
Red, Orange, and Yellow Zircon: These colors are also highly valued and can occur naturally or be enhanced through heat treatment.
Colorless Zircon: Known for its high dispersion and brilliance, often used as a diamond substitute.

Characteristics

Luster: Zircon has an adamantine luster, giving it a brilliant sparkle.
Clarity: High-quality zircon is transparent, though inclusions are common.
Dispersion: Zircon exhibits strong dispersion or "fire," which is the splitting of light into various colors.
Hardness: It has a hardness of 6.5 to 7.5 on the Mohs scale, making it suitable for various types of jewelry but requiring some care to prevent abrasion.

Treatments and Enhancements

Heat Treatment: Commonly used to enhance or change the color of zircon, especially to achieve the popular blue hue. This is a widely accepted practice in the gemstone industry.
Natural vs. Treated: Untreated zircons with good color and clarity are rarer and can be more valuable. Disclosure of any treatments is important.

Evaluation and Quality Factors

Color: The most important factor. Rich, vivid colors are highly prized, with blue and red zircons being particularly valued.
Clarity: Zircon is typically eye-clean, meaning it has no visible inclusions to the naked eye. Stones with fewer inclusions are more valuable.
Cut: A well-cut zircon maximizes its brilliance and fire. It is often cut in brilliant or step cuts to showcase its optical properties.
Carat Weight: Larger zircons are available and can be quite valuable, though the overall value is influenced by the combination of color, clarity, and cut.

Symbolism and Uses

Symbolism: Zircon is associated with prosperity, wisdom, and honor. It is believed to promote spiritual growth and bring protection.
Jewelry: Used in various types of jewelry, including rings, earrings, pendants, and bracelets. Its brilliant sparkle makes it a popular choice for fine jewelry.

Care and Maintenance

Durability: While zircon is relatively hard, it can be brittle and may chip or abrade over time. Care should be taken to protect it from knocks and scratches.

Buying Tips

Certification: Purchase from reputable dealers and ask for a gemological certificate from recognized laboratories (e.g., GIA, AGS) to confirm the authenticity and any treatments.
Examine the Stone: Look for even color distribution and good clarity. Evaluate the cut to ensure the stone exhibits good brilliance and fire.

Natural zircon gemstones, with their diverse colors and exceptional brilliance, are a captivating choice for jewelry lovers and collectors.