Which inclusions are commonly seen in natural diamonds?

• A. Gas bubbles only
• B. Crystals, needles, clouds, feathers, and pinpoints
• C. Metallic flecks
• D. No inclusions at all

Answer: (B)

Inclusions in natural diamonds come from materials and features trapped during growth deep in the Earth, so you see a variety of internal patterns rather than a uniform clear stone. The most commonly observed inclusions are a mix of mineral crystals, elongated needles, cloudy areas, feather-like fractures, and tiny pinpoint crystals. Crystals of other minerals embedded inside the diamond are very common, and slender needle-like crystals add linear detail. Clouds are clusters of many small crystals or irregular growth that create a hazy appearance, while feathers are internal fractures that often look wispy or feathered. Pinpoints are tiny crystals that appear as very small specks. This combination—crystals, needles, clouds, feathers, and pinpoints—covers the typical inclusions you’re likely to encounter in natural diamonds. Gas bubbles can occur, but they aren’t the only or defining type, metallic flecks aren’t a general category you’d expect, and natural diamonds almost always show some inclusions, so the option claiming no inclusions at all isn’t realistic.