December is uniquely represented by not one, but two Avery birthstones: Blue Topaz and Blue Zircon. Both gemstones offer a captivating blue hue, but possess distinct geological origins, gemological properties, and historical significance. This article will delve into the characteristics of each stone, exploring their history, sources, properties, and care, as understood through available documentation.
A History of December’s Blues
The selection of birthstones has evolved over time, with varying traditions across different cultures. While the modern list is standardized, historical associations often differed. Blue Topaz and Blue Zircon have both been linked to December, reflecting a preference for blue gemstones during the winter months.
Blue Zircon, in particular, boasts a history steeped in lore. During the Middle Ages, it was believed to aid sleep, bring prosperity, and promote honor and wisdom to those who wore it. The name itself is thought to originate from the Persian word “zargun,” meaning “gold-colored,” a reference to the gem’s original coloration before heat enhancement became common practice.
Blue Topaz, while historically rarer, has gained prominence in recent years due to advancements in enhancement techniques. Its association with December is more recent, coinciding with the increased availability of vibrant blue hues.
Geological Formation and Sources
The formation of both Blue Topaz and Blue Zircon occurs within the Earth’s crust, but through different geological processes and in distinct locations.
Blue Topaz, as commonly found today, often begins as colorless topaz extracted from the earth. The majority of blue topaz on the market has undergone irradiation and subsequent heating to achieve its characteristic blue color. This enhancement process is considered permanent. Natural sources of topaz are found in Brazil, Sri Lanka, and Australia.
Blue Zircon originates from a variety of locations, including Thailand, Cambodia, and Vietnam. The mineral zircon itself occurs in many colors, but the sought-after blue shade is typically achieved through heat enhancement. The gem’s luster and fire contribute to its desirability. Aventurine, a related gemstone, is found in a wider range of locations including Brazil, Chile, India, Austria, Spain, Russia and Tanzania.
Gemological Properties: A Comparative Look
Understanding the gemological properties of Blue Topaz and Blue Zircon is crucial for both appreciation and proper care. These properties dictate the stone’s durability, brilliance, and overall aesthetic appeal.
Blue Topaz:
- Mohs Hardness: 8
- Color: Sky blue, achieved through irradiation and heating of colorless topaz.
- Enhancement: Commonly irradiated and heated to produce the blue color.
- Sources: Brazil, Sri Lanka, Australia.
- Care: Avoid direct sunlight or extreme/prolonged heat to prevent damage and fading.
Blue Zircon:
- Mohs Hardness: 7.5
- Color: Blue, achieved through heat enhancement.
- Enhancement: Typically heat-treated to achieve the blue shade.
- Sources: Thailand, Cambodia, Vietnam.
- Care: Avoid rough wear, as the stone tends to abrade.
The Mohs scale of hardness provides a comparative measure of a mineral’s resistance to scratching. A higher number indicates greater hardness. Topaz, with a hardness of 8, is more resistant to scratching than Zircon, which registers at 7.5. This difference in hardness impacts the stone’s suitability for various types of jewelry and its susceptibility to wear and tear.
| Property | Blue Topaz | Blue Zircon |
|---|---|---|
| Mohs Hardness | 8 | 7.5 |
| Typical Color | Sky Blue | Blue |
| Common Enhancement | Irradiation & Heat | Heat |
Symbolism and Metaphysical Beliefs
While documentation focuses primarily on the gemological aspects of these stones, some historical beliefs are noted. As previously mentioned, Blue Zircon was believed during the Middle Ages to aid sleep, bring prosperity, and promote honor and wisdom.
While specific metaphysical properties of Blue Topaz are not detailed in the provided sources, the association of blue with tranquility and stability suggests a similar calming influence. The historical reverence for amethyst, another purple-hued gemstone, as a symbol of royalty and triumph over vice, may extend to blue gemstones as well, representing dignity and strength.
Care and Cleaning
Proper care is essential to maintain the beauty and longevity of both Blue Topaz and Blue Zircon jewelry.
Blue Topaz requires protection from direct sunlight and extreme or prolonged heat, as these conditions can cause damage and fading.
Blue Zircon, being slightly softer, is more susceptible to abrasion. Therefore, it is advisable to avoid rough wear and potential scratching.
General cleaning recommendations for both stones include using mild soap and warm water, and avoiding harsh chemicals or ultrasonic cleaners. A soft cloth should be used to gently polish the gemstone, restoring its brilliance. Aventurine, a related gemstone, should also avoid all chemicals, ultrasonic cleaners, and extreme or prolonged heat.
Recent Developments and Market Trends
Recent years have seen a surge in the availability of enhanced Blue Topaz, making it a more accessible and affordable option for consumers. James Avery Artisan Jewelry has featured both Blue Topaz and Blue Zircon in their birthstone collections, alongside other gemstones like Aqua Spinel and Amethyst.
The company has also expanded its offerings to include lab-created gemstones, such as Aqua Spinel, providing customers with a wider range of choices. In 2023, James Avery launched a new Christmas collection featuring charms and jewelry with birthstones, including Blue Topaz. They have also opened new stores and regional offices, demonstrating continued growth and commitment to customer service.
Conclusion
Blue Topaz and Blue Zircon represent the captivating beauty and diverse origins of December’s birthstones. While both offer a stunning blue hue, their distinct geological formations, gemological properties, and historical associations provide unique appeal. Understanding these differences allows for informed selection and proper care, ensuring that these gemstones continue to bring joy and meaning for generations to come. The increasing availability of enhanced Blue Topaz and the inclusion of lab-created options further expand the possibilities for celebrating this special month with a gemstone that resonates with individual style and preference.