Choosing Between Two Strong Pigeon Blood Rubies: Clarity, Inclusions, and the Final Call

The Real Decision When Every Carat and Color Already Impresses

You have narrowed your search down to two vivid pigeon blood rubies. Both are eye-clean enough at arm's length, both carry the saturated red that defines the term, and both sit near your budget ceiling. After hours of comparison, the remaining difference comes down to what the microscope reveals: one stone shows a few fine silk needles and a tiny crystal under the table, the other is cleaner inside but has a barely perceptible color zone along one edge. Which one should you take home?

The answer is not simply "the cleaner one." In ruby, inclusions are not always defects. They are part of the stone's identity, stability, and sometimes its proof of natural origin. The better purchase depends on what those inclusions do to the stone face-up, whether they threaten durability, and how they influence the stone's long-term beauty and value. This guide walks you through the inclusion-and-transparency tradeoff so you can make the final call with confidence.

Why "Pigeon Blood" Describes Color, Not Clarity

Before weighing inclusions, understand what the term pigeon blood actually means. It is a market term, not a laboratory grade, that describes a vivid red with a hint of pink or purple, strong saturation, and no brown or orange modifier. Some laboratories issue pigeon blood descriptions for rubies that meet strict color criteria, but the term does not certify clarity, transparency, or absence of inclusions. Two stones can both be called pigeon blood and still differ meaningfully in internal characteristics.

When a seller labels a ruby pigeon blood, ask whether the term comes from a recognized gemological laboratory or is a marketing description. A laboratory color description adds confidence, while a seller's own label only tells you what the seller wants you to believe. In a final comparison between two stones, the color description matters less than what the inclusions do to the stone's appearance under normal viewing.

What Inclusions Actually Do in Ruby

Inclusions in ruby range from fine silk (rutile needles) to crystals, fingerprints, and healed fractures. Their visual impact depends on size, position, and contrast, not merely presence.

Silk: Friend or Foe?

Fine, evenly distributed silk can diffuse light and create a soft glow called a sheen or luster, which some buyers find pleasing. More importantly, dense silk is a classic sign of untreated, natural ruby and is often associated with high-quality Burmese material. However, if silk is so dense that it clouds the stone or blocks light return, it reduces transparency and makes the red look flat or milky. In your comparison, a stone with fine silk that still appears bright and transparent is generally more desirable than one with heavier silk that deadens the color.

Crystals and Other Inclusions

A small crystal or fingerprint under the table or near the girdle may be invisible face-up unless it reflects light or sits in a path of high brilliance. Many rubies contain such inclusions, and they rarely affect beauty. A crystal that reaches the surface or creates a crack, however, is a different matter because it can influence durability and may be a point where fractures begin.

Position Matters More Than Count

An inclusion under the table (the top facet) may be more visible than several inclusions in the crown or pavilion areas that are hidden by facets or brilliance. Ask to view the stone at arm's length, at about 30 cm, and under indoor lighting, not just under a desk lamp or gem light. If the inclusion is invisible or very subtle in these conditions, it may not matter for a ring worn daily. If it is visible as a dark spot or white streak, it will likely be noticeable every time.

Transparency: The Quality Factor That Overrides Small Inclusions

Transparency is how well light passes through the stone and returns to your eye. A ruby can be inclusion-free but still appear dark or dull if it is cut too deep or has extinction (dark areas where light is lost). Conversely, a stone with visible inclusions can still have excellent transparency if the inclusions are sparse and the cut allows light to move freely.

When comparing two stones, look at the overall brightness and liveliness of the red. Hold each stone over a white card and tilt it gently. Does the color stay consistent, or does one side go dark? A stone that faces up bright, with even color across its surface, will usually appear more attractive than a cleaner stone with dark zones or a window (a see-through area where light passes without reflecting). The pigeon blood label may be identical, but the visual energy of the stone differs.

In your scenario, the cleaner stone with a subtle color zone could lose points if that zone appears as a lighter or browner patch when viewed face-up. The included stone with fine silk might actually show richer, more uniform red because the silk scatters light and masks zoning. Examine both under diffuse daylight and incandescent light; the same stone can look different in each.

Inclusions as Proof of Origin and Treatment

Inclusions are not just visual details; they are diagnostic evidence. For a ruby marketed as untreated and of a specific origin (such as Burmese), inclusions play a crucial role in laboratory testing. A laboratory may use the presence (or absence) of certain inclusion features, alongside trace-element analysis, to support an origin opinion or a conclusion that a stone has not been heated.

If one of your two candidates carries a report from a recognized laboratory stating it is natural, unheated, and of Burmese or another origin, and its inclusions are consistent with that report, then those inclusions have evidentiary value. They help confirm what you are paying for. A cleaner stone without a report may be beautiful, but you lose the documentation that authenticates its natural origin and treatment status. If provenance and treatment disclosure matter to you, the included stone with a reliable report may be the smarter buy even if its clarity is slightly lower.

On the other hand, if the included stone has no report and the seller only says "probably unheated," then its inclusions are less useful and you are taking a risk on treatment disclosure. In that case, the cleaner stone with a current laboratory report (even if it states "heated") may give you better confidence in what you own.

Durability: When Inclusions Become Risk Facts

Most rubies are tough enough for ring wear because corundum has excellent toughness and hardness (9 on the Mohs scale). However, certain inclusions can create weak points. Surface-reaching cracks, fractures, or cleavages are more serious than internal inclusions. If either stone contains a fracture that reaches the girdle or crown, it could chip or split during setting, cleaning, or an impact. A heavily included stone with internal fractures may be less durable than a cleaner stone, regardless of color.

Ask about the type and position of inclusions. A small crystal fully enclosed in the stone is harmless. A fracture that you can see with a loupe and that runs to the surface deserves caution. Also consider that some treated rubies have fractures filled with glass or resin; these fillers can degrade with heat or ultrasonic cleaning and may reduce durability. If a stone is described as "clarity enhanced" or "fracture filled," it has had such treatment, and you should weigh its long-term care requirements.

Making the Final Call: A Decision Framework

When the two stones are truly close, use a structured approach rather than a gut feeling. First, assign relative weight to the factors that matter for your intended use. If the ruby is for a ring you will wear daily, durability and setting risk may outweigh a slightly visible inclusion. If it is for a pendant or earrings, a small inclusion hidden behind a prong may not matter.

Second, commit to your lighting test. Arrange to view both stones side by side under the same lighting you expect to wear them in. Take them to a window (but not direct sun) and into a room with warm incandescent light. Note where each stone looks its best and worst. A pigeon blood ruby that looks vibrant in one light but dull in another may be less versatile than one with a slight but consistent color.

Third, ask each seller pointed questions: Has the stone been heated or otherwise treated? If untreated, is there a laboratory report? Do you have a report that mentions origin or pigeon blood? What inclusions does the stone have, and are any surface-reaching? Would you describe the stone as eye-clean at 30 cm in normal lighting? The quality of the answers tells you about the seller's confidence and honesty.

Finally, compare total ownership experience, not just the stone. A stone with tiny inclusions but accompanied by a respected laboratory report, a clear return policy, and a seller who readily answers questions may offer greater peace of mind than a nominally cleaner stone with vague disclosure.

When to Compromise: A Small Table to Guide Your Priorities

The following table summarizes the tradeoff between a slightly included but possibly more authentic or characterful stone versus a cleaner but potentially less documented or less lively stone. Use it as a checklist, not a formula.

Common Mistakes in This Final Comparison

One common mistake is over-relying on the 10x loupe. Under magnification, every natural ruby shows something. The question is not whether you see inclusions under a loupe, but whether they are visible to the naked eye in normal wear. Another mistake is assuming that a cleaner stone is automatically more valuable. In ruby, a stone with visible but innocuous inclusions can still command a premium if its color is exceptional and it is documented as unheated with a desirable origin. A perfectly clean but treated ruby from a common source may be less desirable to a collector.

A third error is judging transparency from a photograph or video. Sellers often use bright light to make a stone look more transparent than it is. The only reliable way to evaluate transparency is to hold the stone at arm's length and tilt it, observing whether the entire stone returns light evenly. If you are buying online, request a short video under normal indoor lighting, not just a dark background with a spotlight.

Deciding for Your Priorities

If you are a collector or you plan to pass the ruby down, the weight of documentation and natural-origin status often tips the balance toward the included stone with a laboratory report, provided that the inclusions do not threaten durability and do not mar face-up beauty. A fine, unheated Burmese ruby with silk and a tiny crystal is a treasure that many collectors would choose over a cleaner but undocumented stone.

If you are a jewelry buyer who will wear the ring every day and care more about a flawless look than about origin, the cleaner stone may serve you better. Yet you should insist on full treatment disclosure and, if possible, a laboratory report stating that the stone has not been clarity enhanced. A stone with a slight color zone that is only visible from one angle may be a practical choice.

There is no universal best answer. The correct decision is the one that aligns with your values, your budget, and the stone's intended life. Let what you see with your own eyes, what the seller documents, and what your intended wear demands be your final advisors.