A B-grade Herkimer diamond is a less clear and more included variety of Herkimer quartz crystal, often with visible flaws, cloudy areas, or mineral inclusions, making it lower quality compared to the highly transparent, A-grade Herkimer diamonds.

Herkimer diamond is a less clear and more included variety of Herkimer quartz crystal, often with visible flaws, cloudy areas, or mineral inclusions, making it lower quality compared to the highly transparent.