There are many astounding wonders and perplexing abnormalities in the world of gemstones.Gemstone lovers and fans sometimes wonder, "What are the Most Expensive Gemstones in the world?" The availability, demand, and market value of the specimen are just a few of the many variables that really affect a gemstone's value. There are several gemstones that are far more valuable, expensive, and highly prized than the conventional goliath gemstones, despite the fact that most people think of the BIG 4 (diamonds, rubies, yellow sapphires, and emeralds) as the most costly stones.