The cost of a real Diamond Chain can vary widely depending on several factors, including the size, quality, and type of diamonds used, as well as the design and brand. Here are some general price ranges to give you an idea, but keep in mind that these can change over time due to market fluctuations and other factors:

1. Diamond Quality: The quality of the diamonds is one of the most significant factors influencing the price. Diamonds are graded based on the "Four Cs" - carat weight, cut, color, and clarity. The higher the quality in each of these categories, the more expensive the chain will be.
2. Carat Weight: The total carat weight of the diamonds used in the chain significantly impacts the cost. Larger diamonds are more expensive.
3. Cut: Well-cut diamonds with precise proportions and excellent symmetry tend to cost more.
4. Color: Colorless or near-colorless diamonds are more valuable than those with noticeable color. The Gemological Institute of America (GIA) grades diamonds on a D-to-Z scale, with D being completely colorless.
5. Clarity: Diamonds with fewer inclusions (internal flaws) are more valuable. The GIA grades diamonds for clarity, with Flawless being the highest grade.
6. Design: The design of the 18K White Gold Chain, the metal used (e.g., white gold, yellow gold, platinum), and any additional gemstones or unique settings can all impact the price.
7. Brand: Some jewelry brands are known for their high-quality and expensive diamond jewelry, which can significantly increase the cost.
8. Market Conditions: Market conditions and trends can influence the price of diamond jewelry.

To give you a rough idea, a basic diamond chain with smaller, lower-quality diamonds can start at a few hundred dollars, while a high-end, designer diamond chain with larger, top-quality diamonds can cost tens of thousands or even hundreds of thousands of dollars. In some cases, exceptionally rare and large diamonds can lead to even higher prices.

It's essential to do your research and work with a reputable jeweler who can help you find a diamond chain that fits your budget and meets your desired specifications. Keep in mind that certification from a reputable gemological laboratory, like the GIA, can provide assurance of a diamond's quality and help you make an informed purchase.

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