Weight (Specific Gravity): Moderately High – 3.65. It has a noticeable “heft,” feeling heavier than most quartz or topaz of similar size.
Treatment: Benitoite is virtually never treated. Its value lies in its natural rarity and color. Given its extreme scarcity, there is no known commercial enhancement, and synthetic benitoite is primarily produced for scientific study, not gem purposes.
Body (Clarity/Transparency): Gem-quality Benitoite is transparent. It typically forms in small, flat, tabular, or acute triangular crystals. It has poor cleavage, which makes cutting challenging. Its tenacity is brittle. The most valued stones combine a rich blue hue with high clarity and strong fiery dispersion.
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