: Formed in the earth over millions of years. They are valued for their rarity and unique "fingerprints" (natural inclusions).

Whether you’re looking for a sapphire birthstone or a statement emerald necklace, use this guide to shop with confidence. 1. Know Your Stones: Natural, Lab-Grown, or Simulant?

While the Four Cs (Cut, Color, Clarity, Carat) are famous for diamonds, they apply to colored gemstones too, though "Color" is the undisputed king here. 10 Things to Know When Buying Gemstones Online - GemsBiz