The word "diamond" comes from an ancient Greek word. Diamond is the hardest substance on earth known in nature. This expensive gemstone is known for its beauty, durability, and strength. The hardness of a diamond depends on the level of purity. 

Pure and flawless diamonds have a higher degree of hardness. Gemstones exhibit extraordinary optical properties. They are clear, transparent, and colorless. Gemstones are widely used in jewelry, including brooches, earrings, necklaces, and rings. You can search for dark blue stone at https://cwordsworth.com/blue-gemstones/ to wear for a natural look. 

Diamonds are not only colorless but also colored. Some of the colored diamonds are naturally brown, yellow, purple, orange, pink, green, red, black, and blue diamonds. Colored diamonds are made in the presence of impurities in the crystal lattice. 

Natural blue diamonds are formed due to the presence of boron in their structure. The shades of blue vary depending on the number of pines present. The intensity of the blue color increases as the number of boron increases. 

The different shades of blue in a natural blue diamond are fantasy light blue, fantasy blue, fantasy light blue, fantasy dark blue, light blue, deep blue, green-blue, and dark gray-blue. Natural blue diamonds are the rarest, most valuable, and most expensive. These colored gemstones account for less than 0.1 percent of global diamond production. 

This precious gemstone is more appreciated for its rarity, legendary timeless mysticism, and sublime beauty. This precious gemstone was used in necklaces, crowns, and other royal-style jewelry worn by kings, queens, and royals. This blue gemstone symbolizes calm and serenity. They are a symbol of classic and refined elegance.