Popular gemstones in the USA include diamonds, cherished for their brilliance and strength, and sapphires, prized for their deep blue hues. Rubies captivate with their fiery red color, while emeralds enchant with vibrant greens. Opals dazzle with iridescent play-of-color, and amethysts charm with regal purple tones. Aquamarines offer a serene sea-blue allure, and topaz shines in golden to icy hues, making these gems timeless treasures in American jewelry.