Most affordable black diamonds found in jewelry stores are natural colorless diamonds that have been "enhanced" through irradiation or high-heat treatments to turn them black.
These get their color from high concentrations of dark inclusions (mostly graphite) during formation. They are extremely rare and the most expensive option. black diamond buy online
These offer the same chemical composition as natural diamonds but are created in a controlled environment, often providing a more uniform appearance at a lower price point. Most affordable black diamonds found in jewelry stores