Clarity in sapphires

Clarity refers to the presence—or absence—of internal features known as inclusions within a gemstone. While diamonds are graded with a strict, magnification-based system, sapphires (and most colored gemstones) are judged more practically: clarity is typically assessed with the naked eye, not under 10x magnification. This approach reflects how the gemstone is experienced in real-world settings—by visual impression rather than lab precision.

Sapphires almost always contain some inclusions. These may be natural crystal structures, fine mineral threads (often called “silk”), or tiny fractures formed during the gem’s formation deep within the earth. Inclusions are not necessarily negative; they often confirm a sapphire’s natural origin. However, the fewer and less visible the inclusions, the more valuable and rare the stone becomes.

Clarity in sapphires influences three key things:

  • Appearance: Heavy inclusions can cloud the stone or block light, reducing brilliance and dulling color.

  • Durability: Some inclusions, especially surface-reaching fractures, may weaken the gem structurally.

  • Value: Eye-clean sapphires are rare and command premium prices.

Sapphires are classified as Type 2 gemstones, meaning some inclusions are expected and acceptable. Within this context, stones can range from heavily included (with visible internal features that affect beauty) to eye clean, where no inclusions are visible to the unaided eye.

Ultimately, clarity is one of several important factors—alongside color, cut, and origin—that determine a sapphire’s beauty and worth. In many cases, a sapphire with minor inclusions but an exceptional color may still be more valuable than a cleaner stone with a weaker hue

Comparison: Heavily Included vs. Eye Clean Sapphires

AspectHeavily IncludedEye Clean
Brilliance & TransparencyVisible inclusions can obstruct light entering and exiting the stone, reducing brilliance, sparkle, and transparency. The stone may appear cloudy or dull.No visible inclusions allow light to pass freely, resulting in superior brilliance, clarity, and a more vibrant appearance.
DurabilitySurface-reaching fractures or dense inclusions can weaken the stone, making it more prone to cracking or chipping.Structurally stronger due to minimal internal inclusions; better suited for long-term wear.
Value & MarketabilityLower value due to reduced visual appeal and durability; often used in lower-tier jewelry or sold at discounted prices.Rare and desirable; commands higher prices and is more attractive to buyers and collectors.
Visual AppealInclusions—especially if dark or clustered—can distract from the stone’s beauty and interfere with the perception of color and brilliance.Clean, uninterrupted view enhances the natural color and sparkle, contributing to a refined and luxurious look.