What To Know
- The pattern of colors in natural opals is often irregular and unique, reflecting the natural formation process.
- Lab-created opals, however, tend to be more opaque due to the presence of impurities or additives used in the synthesis process.
- Lab-created opals, on the other hand, are generally free of inclusions due to the controlled environment in which they are synthesized.
In the realm of gemstones, opals stand out with their mesmerizing play of colors and unique patterns. However, the advent of lab-created opals has raised questions about authenticity and the ability to distinguish them from natural opals. This comprehensive guide will equip you with the knowledge to confidently identify lab-created opals, ensuring informed decisions when making your next opal purchase.
Understanding Lab-Created Opals: A Technological Marvel
Lab-created opals, also known as synthetic opals, are meticulously crafted in controlled laboratory environments. These opals share the same chemical composition and structure as their natural counterparts, exhibiting similar optical properties. The process involves meticulous synthesis, replicating the natural conditions under which opals form.
Benefits of Lab-Created Opals: A Sustainable Alternative
Lab-created opals offer several advantages over natural opals. Their production is environmentally sustainable, eliminating the need for mining and preserving natural opal deposits. Additionally, lab-created opals are often more affordable than natural opals, making them accessible to a wider range of consumers.
Visual Inspection: Unveiling the Clues
1. Color and Pattern Examination:
- Natural opals showcase a captivating play of colors known as opalescence. This play of colors typically appears as flashes of blue, green, red, and yellow. Lab-created opals may exhibit similar opalescence, but it often lacks the depth and complexity of natural opals.
- The pattern of colors in natural opals is often irregular and unique, reflecting the natural formation process. Lab-created opals, on the other hand, may display more uniform and repetitive patterns due to the controlled synthesis process.
2. Transparency and Clarity:
- Natural opals often exhibit a degree of transparency, allowing light to pass through them. Lab-created opals, however, tend to be more opaque due to the presence of impurities or additives used in the synthesis process.
- Clarity is another distinguishing factor. Natural opals may contain inclusions or imperfections, which are remnants of the natural formation process. Lab-created opals, on the other hand, are generally free of inclusions due to the controlled environment in which they are synthesized.
Microscopic Analysis: A Deeper Dive into Opal Structure
1. Magnification Examination:
- Using a microscope, gemologists can examine the opal’s surface for clues about its origin. Natural opals often display a characteristic “fire” or “iridescence” under magnification. This effect is caused by the diffraction of light within the opal’s structure. Lab-created opals may also exhibit iridescence, but it is typically less pronounced.
- Additionally, microscopic examination can reveal growth patterns or inclusions that differ between natural and lab-created opals. These subtle differences provide valuable insights into the opal’s origin.
2. Spectroscopic Analysis:
- Spectroscopic techniques, such as infrared spectroscopy, can provide further insights into the opal’s chemical composition. Natural opals exhibit specific absorption patterns in the infrared region of the spectrum. Lab-created opals may exhibit similar patterns, but they may also contain additional peaks or variations due to the presence of impurities or additives.
Gemological Testing: Seeking Expert Opinions
1. Gemological Certification:
- Reputable gemological laboratories, such as the Gemological Institute of America (GIA), offer opal certification services. These laboratories employ advanced testing techniques to determine the origin of opals, providing reliable documentation of their authenticity.
- Gemological certificates provide peace of mind to buyers, ensuring that they are purchasing genuine natural opals.
2. Professional Gemologists:
- Consulting with experienced gemologists can be invaluable when seeking to identify lab-created opals. Gemologists possess the knowledge and expertise to examine opals using various techniques, including visual inspection, microscopic analysis, and spectroscopic analysis.
- Their professional opinion can provide valuable insights into the opal’s origin and authenticity.
The Bottom Line: Empowering Informed Decisions
With the knowledge gained from this comprehensive guide, you are now equipped to confidently navigate the world of opals, discerning between natural and lab-created gemstones. Remember that seeking the guidance of experienced gemologists and reputable laboratories is essential for obtaining accurate and reliable information about the authenticity of opals.
Frequently Asked Questions: Unraveling Common Queries About Lab-Created Opals
1. Q: Are lab-created opals as valuable as natural opals?
- A: The value of an opal, whether natural or lab-created, is determined by various factors such as color, pattern, clarity, and size. While natural opals are generally more valuable due to their rarity and unique characteristics, lab-created opals can also hold significant value, particularly if they exhibit exceptional quality and craftsmanship.
2. Q: Are lab-created opals durable?
- A: Lab-created opals are generally durable and can withstand everyday wear and tear. However, they may be slightly more susceptible to scratching and chipping compared to natural opals. Proper care and maintenance, including avoiding exposure to extreme temperatures and harsh chemicals, are essential to preserve the beauty and integrity of both natural and lab-created opals.
3. Q: Can lab-created opals be used in jewelry?
- A: Absolutely! Lab-created opals are widely used in jewelry, offering a stunning and affordable alternative to natural opals. They can be set in rings, necklaces, earrings, and various other jewelry pieces, adding a touch of brilliance and color to any outfit.
