London blue topaz is a captivating gemstone, renowned for its rich, deep blue hue. As the designated birthstone for December, it holds a special significance for those born in the final month of the year, and is also traditionally gifted to celebrate the 16th wedding anniversary. This article will delve into the history, geological origins, gemological properties, and care of this increasingly popular gemstone, drawing exclusively from available sources.
History and Lore
The name “topaz” itself has ancient roots, originating from the island of Topazos in the Red Sea, where Romans discovered yellowish gems. While the historical topaz encountered by the Romans differed in color from the modern London blue variety, the name has persisted through time. Topaz is mentioned in biblical texts, and its meaning has evolved over centuries. Traditionally, topaz was believed to possess various powers, though specific lore surrounding the blue variety is less documented in the provided sources. However, the broader symbolism associated with topaz includes protection and vitality.
The modern popularity of London blue topaz is relatively recent, stemming from advancements in gem treatment techniques. While natural blue topaz does exist, it is exceptionally rare. The distinctive deep blue color characteristic of London blue topaz is typically achieved through irradiation and subsequent heating, a process that enhances the gem’s natural properties.
Geological Formation and Sources
Topaz, as a mineral species, occurs naturally in a wide range of colors, including yellow, orange, brown, and colorless. The blue shades, however, are less common in nature. The sources indicate that topaz gemstones are mined in various locations around the globe, including Brazil, China, Russia, Australia, Madagascar, Mexico, Burma (Myanmar), Namibia, Nigeria, Pakistan, Sri Lanka, and the United States.
Brazil remains a particularly important source for topaz. However, due to the scarcity of naturally occurring blue topaz, the majority of London blue topaz available on the market undergoes treatment to achieve its characteristic color. This treatment involves irradiation, followed by heating, or thermal coating.
Gemological Properties
London blue topaz boasts a hardness of 8 on the Mohs scale, making it a relatively durable gemstone suitable for everyday wear. While not as hard as a diamond, it is resistant to scratching and chipping with reasonable care. The sources highlight that London blue topaz is the deepest hue of blue topaz available, contributing to its higher value compared to lighter shades.
The value of a London blue topaz gemstone, like any gemstone, is determined by several factors, including cut, clarity, and dimensions. The cut refers to the proportions, symmetry, and polish of the gemstone, influencing its brilliance and fire. Clarity refers to the absence of inclusions or blemishes within the stone. Dimensions, or carat weight, also play a role in determining value.
Here's a table summarizing key gemological properties:
| Property | Description |
|---|---|
| Hardness (Mohs) | 8.0 |
| Color | Deep grey-blue, reminiscent of London fog |
| Treatments | Commonly irradiated and heated |
| Durability | Good, suitable for frequent wear |
Symbolism and Metaphysical Beliefs
While the provided sources do not extensively detail the metaphysical beliefs surrounding London blue topaz, the broader symbolism associated with topaz includes protection, love, and vitality. Red varieties of garnet, for example, are connected to life-giving blood. The deep blue color of London blue topaz may evoke feelings of tranquility, wisdom, and communication. As the December birthstone, it is often associated with qualities like optimism and resilience.
Care and Cleaning
Maintaining the beauty of London blue topaz jewelry is relatively straightforward. Regular cleaning with warm, soapy water and a soft-bristled toothbrush is recommended to remove dirt and oils. It is important to avoid harsh cleaning methods, such as ultrasonic cleaners or sudden temperature changes, as these can potentially damage the gemstone. The sources specifically advise against steam cleaning. Proper storage, such as in a soft cloth or padded container, will help minimize scratching and wear. Prolonged exposure to bright light should also be avoided, as some gemstones may fade over time.
Suitability for Daily Wear and Purchasing Considerations
London blue topaz rings, earrings, bracelets, and necklaces are well-suited for frequent wear due to the gemstone’s durability. When purchasing London blue topaz jewelry, it is advisable to buy from reputable jewelers to ensure authenticity. Genuine London blue topaz jewelry is typically set in precious metals and may be accompanied by other gemstones. The sources emphasize the importance of trusting the jeweler to guarantee the gem's authenticity.
London blue topaz jewelry is available across a range of price points, making it accessible to a wide variety of budgets. The depth of color, cut, clarity, and size all contribute to the overall cost.
Modern and Traditional Birthstone Lists
The birthstone chart has evolved over time, with both modern and traditional lists existing. According to the sources, November is traditionally associated with topaz, while December’s traditional birthstones include turquoise and lapis lazuli. However, the modern list designates blue topaz as the December birthstone, alongside blue zircon and tanzanite. In the United States, individuals often choose from both lists, selecting the stone that appeals to them most.
Conclusion
London blue topaz stands as a captivating gemstone, prized for its deep blue hue, durability, and relative affordability. From its ancient origins to its modern-day popularity as a December birthstone and a favored choice for jewelry, London blue topaz continues to enchant gemstone enthusiasts and jewelry lovers alike. Its rich color, coupled with its reasonable hardness, makes it a versatile and beautiful addition to any collection. Proper care and cleaning will ensure that this gemstone retains its brilliance for years to come.