Gemstones are valued based on the Four Cs - color, clarity, cut, and carat. Precious stones include diamonds, sapphires, ...

New York-based, upmarket gemstone dealer has created a series of oil paintings entitled "Tree Portraits" that celebrates the ...

The highest-quality gems have no inclusions visible to the naked eye, are vibrant in color, and are typically more expensive gems like rubies, sapphires and emeralds. GIA would rate the highest ...