In recent times, the jewelry market has seen a strong trend toward retro styles, and crystal-clear green jade bracelets have once again captured people's attention. However, some observant buyers have noticed that the "green" in their jade pieces appears to be expanding. How is this possible?
Emerald green jade, also known as gem-grade jadeite, has long been studied for its chromium content. Typically, the green color of jadeite remains stable because it is a mineral without any living components. However, under certain conditions, the green color in jade jewelry can slightly expand or appear more vibrant.
[Image: A close-up of a green jade bracelet]
Emerald jade is primarily composed of sodium pyroxene. When chromium is present during its formation, the jade takes on a striking green hue. Therefore, the presence of chromium directly influences the color of natural jadeite. The greener the jade, the higher the concentration of chromium.
Experts suggest that the amount of chromium in jade jewelry—such as bracelets and necklaces—is largely fixed once the jade is mined and carved. These items are made from pure natural jadeite, so their internal chromium content doesn't change significantly over time. Yet, many people believe that the green color seems to grow or spread over time.
The reason behind this phenomenon is linked to human skin contact. When jade jewelry is worn close to the skin, the heat and moisture from sweat can cause minor changes. The acidic and alkaline components in sweat may seep into the jade through tiny cracks, potentially reacting with chromium ions. This can lead to the migration of chromium within the stone, making the green color appear more intense or expanded.
In addition to color changes, slight variations in the patterns of the jade may occur. However, these changes do not affect the overall value of the piece. It’s a natural process that happens over time due to continuous exposure to body heat and moisture. So, if you notice your jade becoming greener, it's not a sign of poor quality—it's just a unique characteristic of how jade interacts with the human body.
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