Green gemstones are believed to symbolize harmony and healing — only part of the reason they’re so expensive. Green reminds people of nature, so it’s only natural that green gemstones are believed to ...

More recently some green omphacite has also been included in the definition. These are actually metamorphic rocks made up of tiny interlocking mineral crystals which make the gems exceptionally tough.

Tourmaline ranges in color from black or white to vibrant shades of red, green, and blue. The color of the best Maine tourmalines rival tourmaline from world-famous localities in California, Brazil, ...