Which country is known as a significant source of fine sapphires over 100cts.?

Sri Lanka is renowned as a significant source of fine sapphires, particularly for those over 100 carats. The island nation has a long history of sapphire production, and its gems are often noted for their rich colors and excellent clarity. Sri Lankan sapphires are typically extracted from alluvial deposits and are celebrated in the gem world for their unique hues, including the famed cobalt blue and various other vivid shades. The natural conditions and geological history of Sri Lanka have provided an optimal environment for the formation of these high-quality gemstones, making it a premier source in the global gemstone market.

In contrast, while other countries such as Thailand, Australia, and Burma also produce sapphires, they may not be as widely recognized for consistently yielding large stones exceeding 100 carats. Each of these regions has its own notable qualities and mining techniques, but Sri Lanka stands out specifically for the production of substantial and fine sapphires.