Sanbornite
Sanbornite is a rare borosilicate mineral that crystallizes as elongated, prismatic crystals with a blue-green to emerald-green hue. The mineral forms in pegmatites and hydrothermal environments, often displaying a vitreous to greasy luster and a distinctive resinous sheen when well-formed. Its crystal habits are typically slender, tabular prisms or elongated fibers, with a tendency to form in aggregates that highlight its striking color and clarity.
- Formula
- Ba2(Si4O10)
- Rarity
- Rare
- Stability
- Stable
- Collector interest
- Very High Interest
About Sanbornite
Notable specimens have come from classic pegmatite deposits in the United States, offering collectors a chance to study well-terminated crystals and sharp termination faces. The rarity of Sanbornite means specimens are sought after by mineral enthusiasts who appreciate its subtle color and crystal aesthetics, as well as its scientific interest in borosilicate chemistry and structure. Collectors value well-preserved crystals that reveal clean faces, minimal inclusions, and good luster, which together showcase the mineral’s glassy surfaces and vibrant tones.