Lab-created opal, also known as synthetic or man-made opal, is produced in a laboratory using a process that replicates the natural formation of opal. Here are some key differences between lab-created opal and natural opal:
1. Origin: Natural opal is formed over millions of years through the deposition of silica in underground cavities. It is a product of nature and is mined from the earth. Lab-created opal, on the other hand, is created in a controlled laboratory environment using various techniques to mimic the natural process.
2. Composition: Both natural and lab-created opals have a similar chemical composition, primarily consisting of silica (SiO2). However, natural opals may contain impurities and trace elements that contribute to their unique color and play of colors. Lab-created opals are typically free from impurities and have more consistent color patterns.
3. Play of Colors: The play of colors, which is the captivating rainbow-like effect seen in opals, is a defining characteristic of both natural and lab-created opals. However, the play of colors in natural opals can vary widely and is influenced by factors such as the arrangement of silica spheres and impurities within the stone. Lab-created opals are often designed to exhibit a more consistent and vibrant play of colors.
4. Availability: Natural opals are relatively rare and can be found in specific regions around the world, such as Australia, Ethiopia, and Mexico. Their scarcity contributes to their higher price. Lab-created opals, on the other hand, can be produced in large quantities, making them more readily available and generally more affordable.
5. Durability: Natural opals can be delicate and require proper care to prevent damage. They have a hardness level of around 5.5-6.5 on the Mohs scale, which means they are relatively softer compared to other gemstones. Lab-created opals are often more durable and resistant to scratching due to the controlled production process.
6. Ethical Considerations: Lab-created opals are considered an ethical and sustainable alternative to natural opals. The mining of natural opals can have environmental impacts and may involve labor practices that are not always transparent. Lab-created opals offer a conflict-free option for those who are concerned about these issues.
It’s important to note that both natural and lab-created opals have their own unique beauty and appeal. The choice between the two ultimately depends on personal preferences, budget, and ethical considerations.