What is the major source for top-color turquoise today?

The major source for top-color turquoise today is naturally occurring turquoise. This refers to the authentic, unaltered gemstone that is mined from the Earth. Naturally occurring turquoise is valued for its unique color and quality, which can range from a sky-blue hue to a more greenish shade, depending on the presence of copper and iron in its composition.

Imitation turquoise, which is created through synthetic processes or dyed materials, does not possess the same characteristics as natural turquoise and is not considered a legitimate source of top-color turquoise. Similarly, reconstructed turquoise involves taking smaller pieces or crushed turquoise and binding them with a resin or other materials, which also does not qualify as a natural source. Marine turquoise, typically referring to a specific form of turquoise found in certain geographical areas, is not recognized as a major source in the current market.

Understanding the distinction between these different types of turquoise is crucial for identifying true quality and ensuring the authenticity of the gemstones being evaluated or sold in the market.